| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Blarcreen House – Inveresragan | Scotland | Argyll and Bute | Oban | estate | No | Ancient 4m-5m | View On Map |
| Blarney Castle | Ireland | Co. Cork | Cork | castle | Yes | Ancient 4m-5m | View On Map |
| Bleddfa | Wales | Powys | Knighton | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Blendworth | England | Hampshire | Havant | churchyard | Yes | Notable | No Map Data |
| Blewbury | England | Oxfordshire | Oxford | churchyard | Yes | Ancient 5m-7m | View On Map |
| Blickling | England | Norfolk | Aylsham | churchyard | Yes | Ancient 5m-7m | View On Map |
| Blickling Hall Estate | England | Norfolk | Aylsham | garden | Yes | Notable | View On Map |
| Blitterlees | England | Cumbria | Silloth | garden | No | Notable | View On Map |
| Blore Ray | England | Staffordshire | Ashbourne | churchyard | Yes | Lost | View On Map |
| Blosville | France | Calvados - Normandie | Sainte-Mère-Église | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Blunsdon St Andrew | England | Wiltshire | Swindon | churchyard | Yes | Notable | View On Map |
| Boarhunt | England | Hampshire | Fareham | churchyard | Yes | Ancient 7m+ | View On Map |
| Bobbing | England | Kent | Sittingbourne | churchyard | Yes | Ancient 4m-5m | View On Map |
| Bobbington | England | Staffordshire | Stourbridge | churchyard | Yes | Lost | View On Map |
| Bockleton | England | Worcestershire | Leominster | churchyard | Yes | Ancient 5m-7m, Ancient 7m+ | View On Map |
| Bodcott Farm | England | Herefordshire | Hereford | footpath/road | Yes | Ancient 7m+ | View On Map |
| Boisney | France | Eure - Normandie | Brionne | churchyard | Yes | Ancient 7m+ | View On Map |
| Bolam Lake Country Park | England | Northumberland | Morpeth | estate | Yes | Notable | View On Map |
| Boldre | England | Hampshire | Southampton | woodland | No | Ancient 4m-5m | No Map Data |
| Bolney | England | Sussex - West | Haywards Heath | churchyard | Yes | Lost | View On Map |