| Aberafan Town Walls | | Urban Defence | Rejected | No Visible | | Aberavon | Not Listed | No |
| Abergavenny Town Walls | | Urban Defence | Certain | Masonry Ruins/Remnants | Y Fenni | Abergavenny | Grade 2 | No |
| Aberystwyth Town Walls | | Urban Defence | Certain | No Visible | Llanbadarn Fawr; Lanbadar; Lampadarn; Lampader | Aberystwyth | Not Listed | No |
| Abingdon Town Defences | | Urban Defence | Possible | No Visible | | Abingdon | Not Listed | |
| Almondbury Burgus Enclosure | | Urban Defence | Possible | Earthwork | | Huddersfield | Not Listed | 13297 |
| Alnwick Town Wall |  | Urban Defence | Certain | Masonry Ruins/Remnants | Alnewyke; Bondgate; Hotspur Gateway; Pottergate; Clayport; Narrowgate | Alnwick | Grade 1 | Nd61 |
| Anstey Village Defences | | Urban Defence | Possible | Earthwork | | Anstey | Not Listed | |
| Arlesey Village Defence | | Urban Defence | Questionable | Cropmark/Slight Earthwork | Etonbury | Arlesey | Not Listed | |
| Arundel Town Defences | | Urban Defence | Certain | Earthwork | St Mary's Gate | Arundel | Grade 2 | |
| Ascott D'oilly Village Defences | | Urban Defence | Possible | Earthwork | Ascot Doilly | Ascott Under Wychwood | Not Listed | 21790 |
| Ashley Village Defences | | Urban Defence | Certain | Masonry Footings | | Ashley | Not Listed | 26727 |
| Ashperton Village Defences | | Urban Defence | Questionable | No Visible | | Ashperton | Not Listed | |
| Askham Village Defences |  | Urban Defence | Certain | Major Building | Ascum; Ascom | Askham | Not Listed | |
| Aylesbury Town Defences | | Urban Defence | Possible | No Visible | | Aylesbury | Not Listed | |
| Bakewell Burh | | Urban Defence | Questionable | No Visible | | Bakewell | Not Listed | |
| Bala Town Defences | | Urban Defence | Questionable | No Visible | | Bala | Not Listed | No |
| Bamburgh Town Defences | | Urban Defence | Questionable | No Visible | | Bamburgh | Not Listed | |
| Banbury Town Defences | | Urban Defence | Certain | No Visible | Cole Bar; Sugarford Bar; St John's Bar; Bridge Gate | Banbury | Not Listed | |
| Bangor Town Defences | | Urban Defence | Questionable | No Visible | | Bangor | Not Listed | No |
| Barnstaple Town Wall | | Urban Defence | Certain | No Visible | Barum | Barnstaple | Not Listed | |
| Barton Upon Humber Town Rampart | | Urban Defence | Possible | No Visible | Castledyke | Barton Upon Humber | Not Listed | |
| Barwick In Elmet Burgus Enclosure | | Urban Defence | Questionable | Earthwork | Wendel Hill | Barwick In Elmet And Scholes | Not Listed | 13299 |
| Bath City Wall |  | Urban Defence | Certain | Masonry Ruins/Remnants | Bathe | Bath | Grade 2* | Ba115 |
| Beaumaris Town Walls |  | Urban Defence | Certain | Masonry Footings | | Beaumaris | Grade 1 | Yes |
| Beddurge Village Enclosure | | Urban Defence | Questionable | Earthwork | | Llanddewi Ystradenny | Not Listed | No |
| Bedford Town Bank And The Kings Ditch | | Urban Defence | Certain | Cropmark/Slight Earthwork | Kings Dyke | Bedford | Not Listed | |
| Belvoir Town Defences | | Urban Defence | Possible | No Visible | Belveder; De Bello Videre | Belvoir | Not Listed | |
| Benington Village Defences | | Urban Defence | Questionable | Earthwork | Bennington | Benington | Not Listed | |
| Beverley Town Defences |  | Urban Defence | Certain | Major Building | North Bar; Norwood Bar; Newbegin Bar; Eastgate Bar; Keldgate Bar | Beverley | Grade 1 | |
| Bewdley Town Gates | | Urban Defence | Certain | No Visible | Welch Gate; Dog Lane Gate; Tinkers Gate | Bewdley | Not Listed | |
| Bishops Castle Town Defences | | Urban Defence | Possible | No Visible | | Bishops Castle | Not Listed | |
| Bishopton Village Enclosure | | Urban Defence | Questionable | Earthwork | | Bishopton | Not Listed | 20970 |
| Bletsoe Village Defence | | Urban Defence | Questionable | No Visible | | Bletsoe | Not Listed | |
| Bolsover Town Defences |  | Urban Defence | Possible | Earthwork | | Old Bolsover | Not Listed | Dr95 |
| Boston Town Defences | | Urban Defence | Possible | Cropmark/Slight Earthwork | | Boston | Not Listed | |
| Bourne Village Defences | | Urban Defence | Questionable | Cropmark/Slight Earthwork | | Bourne | Not Listed | |
| Brackley Town Walls | | Urban Defence | Rejected | No Visible | | Brackley | Not Listed | |
| Bradford On Avon Town Defences | | Urban Defence | Questionable | No Visible | | Bradford On Avon | Not Listed | |
| Brecon Town Walls | | Urban Defence | Certain | Masonry Footings | Aberhonddu | Brecon | Grade 2* | Yes |
| Bridgnorth Town Defences |  | Urban Defence | Certain | Masonry Footings | Bridgenorth; Burgh; Cow Gate; Listley Gate; North Gate; West Gate; Hungary Gate; St Marys Gate; Whitburn Gate; Barrier Gate | Bridgnorth | Grade 2 | |
| Bridgwater Town Defences | | Urban Defence | Certain | No Visible | Brugewauter; Eastover | Bridgwater | Not Listed | |
| Bridport Town Ramparts | | Urban Defence | Possible | No Visible | Brydian | Bridport | Not Listed | |
| Brighton Town Defences | | Urban Defence | Certain | No Visible | | Brighton | Not Listed | |
| Bristol Town Wall | | Urban Defence | Certain | Masonry Ruins/Remnants | | Bristol | Grade 1 | Bs119 |
| Broadstairs York Gate | | Urban Defence | Possible | Masonry Ruins/Remnants | | Broadstairs And St Peters | Grade 2 | |
| Buckingham Town Defences | | Urban Defence | Questionable | No Visible | Bourton | Buckingham | Not Listed | |
| Bungay Town Defence | | Urban Defence | Certain | No Visible | | Bungay | Not Listed | Sf13 |
| Burpham Burh | | Urban Defence | Possible | Earthwork | | Burpham | Not Listed | Ws48 |
| Bury St Edmunds Town Defences | | Urban Defence | Certain | No Visible | | Bury St Edmunds | Not Listed | |
| Cadbury Castle |  | Urban Defence Uncertain | Possible | Earthwork | Cadebi; Cadanbyrig; Castri De Cadebir; Camalet; Camelot; Camallate | South Cadbury | Not Listed | 22904 |