B
- Babbs Mill Lake – Solihull, West Midlands
- Bacombe Hill
- Baggeridge Country Park – South Staffordshire
- Bagnall Road Wood – Stoke-on-Trent
- Ballowfield – Yorkshire Dales National Park
- Barbury Castle Country Park
- Barlaston and Rough Close Common – Stafford
- Barley Valley
- Barlow Common, Selby – Selby, North Yorks
- Barmston Pond
- Barnes Common
- Barnes Meadow
- Barnett's Wood
- Barnham Cross Common
- Barnsbury Wood
- Barnwell (East) – Cambridge
- Barnwell II (West) – Cambridge
- Barnwood Arboretum
- Barr Beacon and Pinfold Wood – Walsall
- Barrow Hill, Dudley – Dudley
- Barrowburn Wood
- Barton Mills Valley
- Barwick Pond – Stockton-on-Tees
- Bassington
- Bassleton Wood and The Holmes – Cleveland
- Batchworth Heath
- Bateswood – Newcastle-under-Lyme
- Batford Springs
- Battersea Park Nature Areas
- Baty's Marsh
- Beacon Hill, Brighton – Brighton & Hove
- Beam Valley
- Beam Valley (Environment Agency Land)
- Beckenham Place Park
- Bedelands Farm
- Bedfont Lakes
- Bedlington Country Park – Wansbeck, Northumberland
- Bedworth Sloughs
- Beechwood Park, Halifax – Calderdale, West Yorks
- Beeston Sidings – Nottingham
- Belfairs
- Bell Lane, Staplehurst
- Belmont Meadows
- Belper Parks – Amber Valley, Derbyshire
- Belsize Wood
- Belton Hills
- Belvidere Meadows
- Bemerton Heath & Barnard's Folly
- Benfield Hill
- Bennett's Hole
- Bentley Priory
- Benwell Nature Park
- Berengrave Chalk Pit
- Berrow Dunes
- Berryhill Fields – Stoke-on-Trent
- Berwick Hills – Middlesbrough
- Bevendean Down
- Beverley Parks – East Riding of Yorkshire
- Bickenhall Orchard
- Biddulph Valley Way – Staffordshire Moorlands
- Bidston Moss – Wirral
- Big Wood and Little Wood - Barnet, London
- Billa Barra Hill – Hinckley and Bosworth, Leicestershire
- Billingham Beck Valley Country Park – Cleveland
- Billingham Beck
- Bills Wood – Solihull, West Midlands
- Bincombe Beeches
- Bingham Linear Park
- Bircham Valley
- Birk Crag – Harrogate, North Yorks
- Birstall – Leicestershire
- Bisham Woods
- Bishop Middleham Community Wildlife Garden – Sedgefield, Durham
- Bishop's Meadow – Charnwood, Leicestershire
- Bishopstone Cliffs
- Bisley Road Cemetery
- Bixley Heath
- Black Bobbies Field Thornaby – Cleveland
- Black Park = Buckinghamshire
- Blackhall Grasslands – Durham
- Blackleach Country Park
- Blackley Forest LNR – Manchester
- Blake Marsh
- Blindley Heath
- Blondin Park, Northfields
- Bluebell Woods – Derbyshire
- Blue Lagoon
- Blundells Copse (Part of West Reading Woodlands)
- Blunts Wood and Paiges Meadow
- Blyth to Seaton Sluice Dunes
- Bobbits Lane
- Bodmin Beacon
- Boggart Hole Clough – Manchester
- Boldre Foreshore
- Bonesgate Open Space
- Borough Woods
- Borough Woods
- Borsdane Wood - Wigan
- Bothenhampton Nature Reserve
- Bourne Park Reed Beds
- Bourne Valley
- Bovey Heathfield
- Bowden Housteads Wood/ Carbrook Ravine – Sheffield
- Bowthorpe Marsh
- Boxley Warren
- Bracken Bank
- Bracken Hill Wood – Durham
- Bradley & Dixon Woods – North East Lincolnshire
- Bradnam Wood
- Bradwell Woods – Newcastle-under-Lyme
- Bramblefields – Cambridge
- Bramcote Park Woodland – Broxtowe, Notts
- Bramford Meadows
- Bramley Bank
- Brandy Hole Copse
- Brankin Moor – Durham
- Branksome Dene Chine
- Braywick Park
- Breadsall Railway Cutting – Derbyshire
- Brearley Wetland – Chesterfield, Derbyshire
- Breary Marsh – Leeds
- Brent Reservoir / Welsh Harp Barnet and Brent, London
- Brentmoor Heath
- Brereton Heath – Cheshire East
- Bretton Country Park – Wakefield, West Yorks
- Breydon Water
- Brickfield and Long Meadow
- Bridge Wood
- Bridgetts Pool – Stoke-on-Trent
- Brierley Forest Park
- Brinkburn – Durham
- Brinsley Headstocks – Broxtowe, Notts
- Broad Ees Dole – Trafford, Gtr Manchester
- Broadlands
- Broadmoor Common
- Broadstone Heath
- Brockwell Meadows
- Brocton – Staffordshire
- Bromham Lake
- Bromwich Wood – Birmingham
- Brookfield Pond – High Peak, Derbyshire
- Brookmill Road
- Brookvale – Sefton, Merseyside
- Broom Hill, Hadleigh
- Brotherton Park and Dibbinsdale – Wirral
- Brough Park Fields – Staffordshire Moorlands
- Brown Moss – Shropshire
- Browns Wood
- Broxhead Common
- Brumby Woods – North Lincolnshire
- Brundall Church Fen
- Brush Hill
- Buckingham Sand Pit
- Bucklands Pool / Backwell Lake
- Buckpool and Fens Pool – Dudley
- Bude Marshes
- Budshead Wood
- Bugdens Copse
- Bull Meadows
- Bulwell Hall Park Meadows
- Bumble Hole – Dudley
- Burbage Common & Woods – Hinckley and Bosworth, Leicestershire
- Bure Park
- Buriton Chalk Pit
- Burlish Top
- Burnt Ash Pond
- Burton and Chingford Ponds
- Burton Mill Wood – Cheshire West and Chester
- Bus Company Island
- Butts Ponds Meadows
- Byerley Park – Sedgefield, Co Durham
- Byron's Pool – Cambridge
Read more about this topic: List Of Local Nature Reserves In England