List of Sites of Special Scientific Interest in Bedfordshire

Bedfordshire is a county in the East of England.[1] It is bounded by Hertfordshire to the south-east, Cambridgeshire to the north-east, Northamptonshire to the north, and Buckinghamshire to the west.[2] It has an area of 1,235 square kilometres (477 sq mi), and population estimated in 2015 at 630,000, with an increase of 10% over the previous ten years.[3] The county town is Bedford, and the name is first recorded in the treaty in about 879 between King Alfred the Great and Guthrum, which divided English and Danish territory by a line which went through Bedford.[4]

Houghton Regis Marl Lakes

Southern Bedfordshire is part of the Chilterns Area of Outstanding Natural Beauty. North and mid Bedfordshire are undulating claylands with broad river valleys of the River Great Ouse and its tributaries, and the Bedfordshire Greensand Ridge. Jurassic and Cretaceous clays are overlaid by Quaternary glacial deposits of chalky boulder clay.[5]

There are forty Sites of Special Scientific Interest (SSSIs) in Bedfordshire, designated by Natural England. Thirty-five are listed for their biological interest, and five for their geological interest.[6] Three of the sites are also National nature reserves, twelve are in the Chilterns Area of Outstanding Natural Beauty, and eleven are managed wholly or partly by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. In 2009 Bedfordshire was divided into three unitary local authorities: thirty-two sites are in Central Bedfordshire, eight in Bedford and none in Luton.

Key

Interest

• B = a site of biological interest
• G = a site of geological interest

Other classifications

• CAONB = Chilterns Area of Outstanding Natural Beauty
• GCR = Geological Conservation Review
• LNR = Local nature reserve
• NCR = A Nature Conservation Review
• NNR = National nature reserve
• NT = National Trust
• RHPG = Register of Historic Parks and Gardens of Special Historic Interest in England
• RSPB = Royal Society for the Protection of Birds
• SM = Scheduled Monument
• WT = Woodland Trust
• WTBCN = Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire

Sites

Site name	Photograph	B	G	Area[lower-alpha 1]	Public access	Location[lower-alpha 1]	Other classifications	Map[lower-alpha 1]	Citation[lower-alpha 1]	Description
Barton Hills				47.9 hectares (118 acres)	YES	Barton-le-Clay 51.956°N 0.418°W, TL088298	NNR[7] NCR[8] CAONB[8]	Map	Citation	This is steeply sloping chalk pasture, which has a wide variety of grasses and flowers. A chalk stream along the valley floor adds wetland flora. Six orchid species have been recorded, including the fragrant orchid and bee orchid. Another notable plant is the pasque flower.[8]
Biddenham Pit				0.4 hectares (0.99 acres)	YES	Biddenham 52.142°N 0.507°W, TL023503	GCR[9]	Map	Citation	This site has interglacial mollusk and mammal fossils, but it is uncertain which warmer period is represented. The lowest level also has Paleolithic stone tools.[9]
Blow's Down				33.4 hectares (83 acres)	YES	Dunstable 51.883°N 0.502°W, TL032215	WTBCN[10] CAONB[11]	Map	Citation	The site has varied habitats with a large area of unimproved grassland, which cattle help to maintain. Features include a disused quarry and medieval cultivation terraces. It has a rare plant, Bunium bulbocastanum, and beetle odontaeus armiger.[12]
Cooper's Hill				17.8 hectares (44 acres)	YES	Ampthill 52.029°N 0.504°W, TL027378	LNR[13] WTBCN[14]	Map	Citation	The site is described by Natural England as the best surviving example in Bedfordshire of heathland on the thin acidic soils of the Lower Greensand Ridge. It also has areas of marsh and woodland.[15]
Deacon Hill SSSI				35.4 hectares (87 acres)	YES	Pegsdon 51.953°N 0.37°W, TL121295	WTBCN[16][17] CAONB[18]	Map	Citation	The site is calcareous grassland which is rich in plant species, some of which are uncommon.[19] Birds include lapwings and buzzards, and there are butterflies such as dingy and grizzled skippers. There are also the remains of ancient strip lynchet fields.[16]
Double Arches Pit				1.7 hectares (4.2 acres)	NO	Heath and Reach 51.953°N 0.641°W, SP935291	GCR[19]	Map	Citation	This site exposes the Lower Greensand geological layer, dating to the Lower Cretaceous around 146 to 100 million years ago.[20]
Dropshort Marsh				2.7 hectares (6.7 acres)	YES	Toddington 51.938°N 0.54°W, TL005276	WTBCN[21]	Map	Citation	This marsh has a variety of habitats, including a scarce quaking bog. Many species are now uncommon due to changes in agricultural practices. it has several springs, with floating sweet-grass and brooklime and areas dominated by rushes.[22]
Dunstable and Whipsnade Downs				73.3 hectares (181 acres)	YES	Dunstable 51.869°N 0.540°W, TL006199 51.858°N 0.552°W, SP998187	NT[23] CAONB[23]	Map	Citation	This is a 3 kilometre long steep escarpment between Dunstable and Whipsnade. The slopes have a typical chalk downland flora, and there are also habitats of scrub and tall herbs. The site is also important for butterflies.[24]
Fancott Woods and Meadows				13.2 hectares (33 acres)	YES	Toddington 51.937°N 0.51°W, TL025275	WTBCN[25]	Map	Citation	The meadows are mainly ancient ridge and furrow, and are unimproved neutral grassland traditionally managed for hay and grazing. Plants include cowslips, ragged-robin, great burnet, common spotted orchid, red fescue, meadow fescue and meadowsweet.[25][26]
Felmersham Gravel Pits				21.5 hectares (53 acres)	YES	Bedford 52.215°N 0.551°W, SP991584	WTBCN[27]	Map	Citation	The site has flooded gravel pits which were worked until about 1945. Other habitats are neutral grassland, scrub and broadleaved woodland.[28] It is one of the best sites in Bedfordshire for dragonflies and damselflies.[27]
Flitwick Moor				58.9 hectares (146 acres)	YES	Flitwick 52.005°N 0.476°W, TL047352	WTBCN[29]	Map	Citation	This is a rich valley mire, and the largest area of wetland in Bedfordshire. Eight species of sphagnum bog moss have been recorded, including one which is nationally rare. The site has areas of woodland as well as wet grassland.[30]
Galley and Warden Hills				47.5 hectares (117 acres)	YES	Warden Hills 51.928°N 0.415°W, TL091267	LNR[31] CAONB[31]	Map	Citation	The site is chalk grassland with areas of dense scrub, and it has many plants which are rare nationally and locally.[32] It has a wide variety of wild flowers and more than twenty species of butterflies.[33]
Hanger Wood				24.0 hectares (59 acres)	NO	Stagsden 52.134°N 0.546°W, SP996494		Map	Citation	This is described by Natural England as a Site of Special Scientific Interest having "one of the best remaining examples of wet ash-maple woodland in Bedfordshire". The ground flora is dominated by bluebell and dog's mercury, with bramble in drier areas.[34]
Houghton Regis Marl Lakes				21.0 hectares (52 acres)	YES	Houghton Regis 51.899°N 0.536°W, TL008233	WTBCN[35] CAONB[36]	Map	Citation	This large disused chalk quarry is a rare example of standing water in chalk. It is important both ornithologically and for its range of dragonflies. There are two marl lakes, which have aquatic plants and molluscs, and there are fens in a waterlogged area between the lakes.[37]
Kensworth Chalk Pit				130.9 hectares (323 acres)	NO	Kensworth 51.866°N 0.517°W, TL022196	GCR[38] CAONB[39]	Map	Citation	The site is a large working quarry which exposes fossiliferous chalk rocks with many rare fossils including ammonites. It is described by Natural England as "an unrivalled locality for stratigraphic studies in the Upper Cretaceous".[40][41]
Kings and Bakers Woods and Heaths				211.3 hectares (522 acres)	YES	Leighton Buzzard 51.96°N 0.655°W, SP925299	NNR[7] NCR[42] WTBCN[43]	Map	Citation	The site has the largest remaining area of woodland in Bedfordshire, together with lowland heath, acidic grassland and some small ponds. There are a number of rare plant species, including great woodrush, wood vetch and saw-wort.[44]
Kings Wood and Glebe Meadows, Houghton Conquest				36.1 hectares (89 acres)	YES	Houghton Conquest 52.052°N 0.477°W, TL045404	LNR[45]	Map	Citation	This site is ancient ash and maple woodland on heavy clay, a habitat which has become rare in lowland England. It is biologically diverse, with a number of rare species. Glebe Meadows has a rich variety of species due to its traditional management.[46]
Knocking Hoe				8.1 hectares (20 acres)	YES	Pegsdon 51.963°N 0.355°W, TL131307	NNR[7] NCR[47] CAONB[48]	Map	Citation	The site is a flat bottomed valley with steep sides. The unimproved chalk grassland has several nationally rare plants, including moon carrot, spotted catsear and pasque flower. The ancient strip lynchet field system is of archaeological interest.[49][50]
Marston Thrift				37.7 hectares (93 acres)	YES	Cranfield 52.065°N 0.583°W, SP972417	LNR[51]	Map	Citation	The site is ash and maple woodland on heavy clay, a habitat which has become scarce in lowland England. It also has areas of damp grassland, and a grassland valley. It is an important site for butterflies, including the rare black hairstreak.[51][52]
Maulden Church Meadow				4.2 hectares (10 acres)	YES	Maulden 52.031°N 0.458°W, TL059381	LNR[53]	Map	Citation	The site is unimproved pasture on the Lower Greensand Ridge. Most of it is neutral grassland with many grass and herb species, and there are small areas of acidic grassland. An open pond has aquatic plants, while two ponds which have been filled in have a varied marsh vegetation.[54]
Maulden Heath				7.6 hectares (19 acres)	YES	Maulden 52.035°N 0.442°W, TL070386		Map	Citation	There are two separate meadows in the site. The eastern meadow has two ridges, which have short grass, a moss layer and many herbs. The western meadow is a steep-sided valley which has similar habitats.[55]
Maulden Wood and Pennyfather's Hill				148.4 hectares (367 acres)	YES	Maulden 52.04°N 0.441°W, TL070391		Map	Citation	This is ancient mixed deciduous and coniferous woodland, with rides and ponds. It has a wide variety of invertebrates, including some which are nationally rare, such as the tiny moth, Dioryctria mutatella and three sawfly species.[56]
Nares Gladley Marsh				5.4 hectares (13 acres)	NO	Leighton Buzzard 51.94°N 0.682°W, SP907277		Map	Citation	The site is on the Lower Greensand in the valley of the River Ouzel. It has marshland with a number of springs, and it has rich plant communities. On higher areas there is acidic grassland.[57]
Nine Acres Pit				20.4 hectares (50 acres)	NO	Leighton Buzzard 51.939°N 0.635°W, SP939276	GCR[58]	Map	Citation	This Lower Cretaceous site exposes layers dating to the Albian and Aptian, between 125 and 100 million years ago. It has one of the most diverse Albian fossils faunas in the world.[59]
Odell Great Wood				85.9 hectares (212 acres)	YES	Odell 52.219°N 0.599°W, SP958588		Map	Citation	This site is wet ash and maple woodland which has an exceptional variety of flora, such as wild daffodil and herb paris. Extensive rides add to its value for invertebrates and flowering plants.[60]
Potton Wood				85.2 hectares (211 acres)	YES	Potton 52.135°N 0.174°W, TL251501		Map	Citation	This wet wood is mainly ash and maple. It shrub layer has species indicative of ancient woodland, such as yellow archangel, wood millet and oxlip, a national rarity. The site also has species-rich rides, ponds and diverse bird species.[61]
Pulloxhill Marsh				5.1 hectares (13 acres)	NO	Pulloxhill 51.989°N 0.464°W, TL056334		Map	Citation	This marsh in a small valley has a wide variety of plant species, including some rare in the country, such as sharpflowered rush and blunt-flowered rush. It also has springs, neutral grassland in higher areas and mature hedgerows.[62]
Sandy Warren				16.4 hectares (41 acres)	YES	Sandy 52.118°N 0.262°W, TL191480	RSPB[63]	Map	Citation	The site is heathland on the acidic soil of the Lower Greensand ridge, which is now comparatively rare. It also has areas of unimproved grassland and birch woodland. Additional habitats are damp areas and seasonal pools, which have some uncommon species such as distant sedge and carnation sedge.[63]
Smithcombe, Sharpenhoe and Sundon Hills				87.5 hectares (216 acres)	YES	Sharpenhoe 51.957°N 0.446°W, TL069299	NT[64] CAONB[65] SM[64]	Map	Citation	Much of the site is unimproved chalk grassland with many plants which are now rare. Orchids include Herminium monorchis and Aceras anthropophorum. There is also beech forest with a ground layer including primroses.[64]
Southill Lake and Woods				25.6 hectares (63 acres)	NO	Southill 52.073°N 0.331°W, TL145429	RHPG[66]	Map	Citation	The wood is a wet valley of alder, fed by springs, and a small stream runs down to the lake. There is fen vegetation in more open areas. The lake has a characteristic population of breeding birds, and an island has one of only two surviving heronries in the county.[67]
Stevington Marsh				7.6 hectares (19 acres)	YES	Pavenham 52.183°N 0.565°W, SP982548		Map	Citation	The site is marshland along the banks of the River Great Ouse. The river, marshes and pastures form varied habitats. The marshes are floristically rich, with the largest one being dominated by great horsetail. The wetland communities and Jurassic limestone grassland are rare habitats in eastern England.[68]
Sundon Chalk Quarry				26.8 hectares (66 acres)	YES	Upper Sundon 51.936°N 0.49°W, TL039275	CAONB[69]	Map	Citation	This site's varied habitats are fen, lakes, chalk grassland, scrub and woodland. Invertebrates include sixteen species of dragonfly and damselfly and twenty-one of butterfly. The site has the largest English colony of the Chiltern gentian.[70]
Swineshead Wood				21.9 hectares (54 acres)	YES	Swineshead 52.289°N 0.446°W, TL061668	WT[71]	Map	Citation	The site is wet woodland which has structural and biological diversity. The most common trees are pedunculate oak and ash and on heavy clay, and bluebells and dog's mercury dominate the ground flora.[72]
Tebworth Marsh				5.7 hectares (14 acres)	YES	Toddington 51.95°N 0.573°W, SP982289		Map	Citation	This site is a base-rich marsh which has diverse plant life. It has springs along the edge of glacial gravel, and this produces wet marsh which is dominated by meadowsweet. Other habitats are neutral grassland, swamp carr woodland, mature ash woodland, a stream and hedgerows.[73]
Tilwick Meadow				3.6 hectares (8.9 acres)	YES	Thurleigh 52.197°N 0.433°W, TL072566		Map	Citation	The meadow is on the site of a medieval village abandoned during the Black Death. It is unimproved grassland on chalk boulder clay, and it has very rich flora on a habitat now rare nationally. Grass species include red fescue and sweet vernal-grass.[74]
Totternhoe Chalk Quarry				13.5 hectares (33 acres)	YES	Totternhoe 51.891°N 0.569°W, SP986224	CAONB[75] WTBCN[76]	Map	Citation	This site is grass chalkland, which is a habitat under threat.There are a number of rare plant species, including great pignut, and butterflies such as the chalkhill blue and the nationally rare Duke of Burgundy.[77]
Totternhoe Knolls				13.4 hectares (33 acres)	YES	Totternhoe 51.888°N 0.58°W, SP978220	LNR[78] WTBCN[76] CAONB[75]	Map	Citation	This is grassland with a rich variety of plant species, including some that are now rare. There are a number of orchids and a wide variety of invertebrates, including butterflies such as the common blue, chalkhill blue, and the scarce small blue and Duke of Burgundy.[79][80]
Totternhoe Stone Pit				2.2 hectares (5.4 acres)	NO	Totternhoe 51.89°N 0.577°W, SP980222	GCR[81] CAONB[75]	Map	Citation	The site displays the base of the Totternhoe Stone. It is a lime mud with an extensive deposit of late Cretaceous shark teeth, some of species which have not been fully described, so it will be an important resource for further research.[82]
Wavendon Heath Ponds				4.7 hectares (12 acres)	YES	Aspley Heath 51.995°N 0.647°W, SP930338		Map	Citation	The site is acidic mire. It has three ponds which have unusual plant communities, two unimproved meadows, some damp birch woodland and a small stream.[83]
Yelden Meadows				2.8 hectares (6.9 acres)	NO	Yelden 52.295°N 0.522°W, TL009673		Map	Citation	The site is a rare example of neutral grassland on clay which has not been improved agriculturally. It is a flood meadow which has been maintained to provide hay with grazing during the winter, and it has a rich variety of plant species.[84]

See also

• List of Local Nature Reserves in Bedfordshire
• National Nature Reserves in Bedfordshire

Notes

1. Maps and citations for each site are taken from the Natural England database. The area and location of the site is shown on the citation. The listing is as on 10 December 2015.

References

1. "East of England". Office for National Statistics. Archived from the original on 13 January 2016. Retrieved 9 December 2015.
2. "Your Guide to the Counties of England". Counties in England. Archived from the original on 10 October 2016. Retrieved 9 December 2015.
3. "Bedfordshire Police". Her Majesty's Inspectorate of Constabulary. Archived from the original on 4 March 2016. Retrieved 9 December 2015.
4. Page, William, ed. (1912). A History of the County of Bedford. 3. London: Victoria County History. p. 1. Archived from the original on 2015-04-02.
5. "Bedfordshire and Cambridgeshire Claylands". National Character Area profile. Natural England. Archived from the original on 11 December 2015. Retrieved 10 December 2015.
6. "Designated Sites View: SSSIs Bedfordshire". Natural England. Archived from the original on 24 November 2017. Retrieved 29 December 2015.
7. "Bedfordshire's National Nature Reserves". Natural England. Archived from the original on 1 October 2015. Retrieved 24 August 2015.
8. "Barton Hills citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 24 August 2015.
9. "Biddenham Pit citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 24 August 2015.
10. "Blow's Downs". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 24 August 2015.
11. "Blows Downs Nature Reserve". Wildlife Extra. Archived from the original on 22 December 2015. Retrieved 10 December 2015.
12. "Blow's Down citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 24 August 2015.
13. "Coopers Hill - Bedfordshire SSSI". Local Nature Reserves. Natural England. 18 February 2013. Archived from the original on 4 March 2016. Retrieved 24 August 2015.
14. "Cooper's Hill". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 24 August 2015.
15. "Cooper's Hill citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 24 August 2015.
16. "Pegsdon Hills and Hoo Bit". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 24 August 2015.
17. "Map of Deacon Hill". Sites of Special Scientific Interest. Natural England. Archived from the original on 21 January 2016. Retrieved 24 August 2015.
18. "Cycling in the Chilterns". Ordnance Survey. Archived from the original on 2015-07-06. Retrieved 10 December 2015.
19. "Double Arches Pit citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 3 March 2016. Retrieved 25 August 2015.
20. "Double Arches Pit citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 3 March 2016. Retrieved 13 June 2016.
21. "Dropshort Marsh". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 25 August 2015.
22. "Dropshort Marsh citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 25 August 2015.
23. "Dunstable Downs and Whipsnade Estate". National Trust. Archived from the original on 19 December 2015. Retrieved 10 December 2015.
24. "Dunstable and Whipsnade Downs citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 4 March 2016. Retrieved 25 August 2015.
25. "Fancott Woods and Meadows". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 25 August 2015.
26. "Fancott Woods and Meadows citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 25 August 2015.
27. "Felmersham Gravel Pits". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 26 August 2015.
28. "Felmersham Gravel Pits citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 7 April 2016. Retrieved 26 August 2015.
29. "Flitwick Moor (& Folly Wood)". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 5 September 2015. Retrieved 26 August 2015.
30. "Flitwick Moor citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 3 March 2016. Retrieved 26 August 2015.
31. "Galley and Warden Hills SSSI". Local Nature Reserves. Natural England. 18 February 2013. Archived from the original on 23 September 2015. Retrieved 10 December 2015.
32. "Galley and Warden Hills citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 23 September 2015. Retrieved 26 August 2015.
33. "Galley and Warden Hills SSSI". Local Nature Reserves. Natural England. 18 February 2013. Archived from the original on 23 September 2015. Retrieved 26 August 2015.
34. "Hanger Wood citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 3 March 2016. Retrieved 27 August 2015.
35. Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire (January 2015). "A Nature Conservation Strategy for Central Bedfordshire" (PDF). Central Bedfordshire Council. pp. 27–28. Archived from the original (PDF) on 22 December 2015. Retrieved 23 August 2015.
36. "Luton, Dunstable & Houghton Regis local transport plan 2006-2011" (PDF). Bedfordshire County Council. p. 18. Retrieved 10 December 2015.
37. "Houghton Regis Marl Lakes citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 4 March 2016. Retrieved 23 August 2015.
38. "Kensworth Chalk Pit". British Upper Cretaceous Stratigraphy (PDF). Joint Nature Conservation Committee. 2001. Archived (PDF) from the original on 2015-12-22.
39. "Kensworth Parish Green Infrastructure Plan" (PDF). Bedfordshire Rural Communities Charity. Archived from the original (PDF) on 2015-12-22. Retrieved 10 August 2015.
40. "Kensworth Chalk Quarry citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 24 September 2015. Retrieved 23 August 2015.
41. "Chalk Places to Visit in Bedfordshire". Geo-East. Archived from the original on 9 August 2016. Retrieved 23 August 2015.
42. "Kings and Bakers Woods and Heaths citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 27 August 2015.
43. "King's Wood and Rammamere Heath". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 2015-09-05. Retrieved 27 August 2015.
44. "Kings and Bakers Woods and Heaths citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 27 August 2015.
45. "Kings Wood and Glebe Meadows, Houghton Conquest". Local Nature Reserves. Natural England. 18 February 2013. Archived from the original on 4 March 2016. Retrieved 23 August 2015.
46. "Kings Wood and Glebe Meadows, Houghton Conquest citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 24 September 2015. Retrieved 23 August 2015.
47. "Knocking Hoe citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 2 April 2015. Retrieved 8 March 2015.
48. "Knocking Hoe National Nature Reserve". Chilterns Conservation Board. Archived from the original on 2 April 2015. Retrieved 8 March 2015.
49. "Bedfordshire's National Nature Reserves". Natural England. Archived from the original on 2 April 2015. Retrieved 8 March 2015.
50. "Knocking Hoe citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 2 April 2015. Retrieved 8 March 2015.
51. "Marston Thrift". Local Nature Reserves. Natural England. 18 February 2013. Archived from the original on 19 November 2015. Retrieved 23 August 2015.
52. "Marston Thrift citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 23 August 2015.
53. "Maulden Church Meadow". Local Nature Reserves. Natural England. 18 February 2013. Archived from the original on 4 March 2016. Retrieved 24 August 2015.
54. "Maulden Church Meadow citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 24 August 2015.
55. "Maulden Heath citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 28 August 2015.
56. "Maulden Wood and Pennyfather's Hill citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 3 March 2016. Retrieved 28 August 2015.
57. "Nares Gladley Marsh citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 13 August 2016. Retrieved 28 August 2015.
58. "Nine Acres Pit citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 3 March 2016. Retrieved 28 August 2015.
59. "Nine Acres Pit citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 3 March 2016. Retrieved 28 August 2015.
60. "Odell Great Wood citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 3 March 2016. Retrieved 28 August 2015.
61. "Potton Woodcitation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 October 2012. Retrieved 22 June 2016.
62. "Pulloxhill Marsh citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 28 August 2015.
63. "Sandy Warren citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 25 September 2015. Retrieved 28 August 2015.
64. "Smithcombe, Sharpenhoe and Sundon Hills citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 28 August 2015.
65. "Sharpenhoe". National Trust. Archived from the original on 23 August 2015. Retrieved 28 August 2015.
66. Historic England. "Southill Park (1000579)". National Heritage List for England. Retrieved 31 August 2015.
67. "Southill Lake and Woods citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 October 2012. Retrieved 31 August 2015.
68. "Stevington Marsh citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 31 August 2015.
69. "Sundon & Streatley Chiltern Arc, Access & Green Space Vision Plan" (PDF). Central Bedfordshire Council. 2013. pp. 8–9. Archived from the original (PDF) on 23 September 2015. Retrieved 31 August 2015.
70. "Sundon Chalk Quarry citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 31 August 2015.
71. "Swineshead Wood citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 1 September 2015.
72. "Swineshead Wood citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 4 March 2016. Retrieved 1 September 2015.
73. "Tebworth Marsh citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 1 September 2015.
74. "Tilwick Meadow citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 4 September 2015.
75. "Totternhoe Knolls". Chilterns Conservation Board. Archived from the original on 22 December 2015. Retrieved 10 December 2015.
76. "Totternhoe". Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. Archived from the original on 26 September 2015. Retrieved 9 September 2015.
77. "Totternhoe Chalk Quarry citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived (PDF) from the original on 24 September 2015. Retrieved 9 September 2015.
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