| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Ballynakilly Wood | Ireland | Co. Carlow | Dublin | woodland | Yes | Ancient 4m-5m | View On Map |
| Ballydarton House | Ireland | Co. Carlow | Carlow | estate | No | Ancient 4m-5m | View On Map |
| Ballinlough castle | Ireland | Co. Westmeath | Meath | historic site | No | Notable | View On Map |
| Ballikinrain House – nr Balfron | Scotland | Stirling | Glasgow | estate | No | Ancient 4m-5m | View On Map |
| Ballencleroch House – Clachan of Campsie | Scotland | East Dunbartonshire | Lennoxtown | parkland | Yes | Ancient 5m-7m | View On Map |
| Ballagan House – Strathblane | Scotland | Stirling | Glasgow | historic site | No | Notable | View On Map |
| Balbirnie House Hotel near Markinch | Scotland | Fife | Glenrothes | garden | Yes | Notable | View On Map |
| Bala lake-Glan Llyn | Wales | Gwynedd | Bala | field | Yes | V - con | View On Map |
| Baglan | Wales | Glamorgan | Neath | churchyard | Yes | Ancient 5m-7m | View On Map |
| Badsey | England | Worcestershire | Evesham | churchyard | Yes | Notable | View On Map |
| Badlesmere | England | Kent | Faversham | churchyard | Yes | Ancient 5m-7m, Lost | View On Map |
| Badgworth | England | Somerset | Cheddar | churchyard | Yes | Notable | View On Map |
| Badgin Wood – Kent | England | Kent | Faversham | woodland | Yes | Notable | View On Map |
| Baddesley Clinton | England | Warwickshire | Solihull | churchyard | Yes | V - con | View On Map |
| Bacton | England | Herefordshire | Hereford | churchyard | Yes | Ancient 5m-7m | View On Map |
| Ayscoughfee Hall Gardens | England | Lincolnshire | Spalding | estate | Yes | Notable | View On Map |
| Aymestrey | England | Herefordshire | Leominster | churchyard | Yes | Ancient 4m-5m | View On Map |
| Aylesford – The Friars | England | Kent | Maidstone | former religious site | No | Notable | View On Map |
| Aylesford | England | Kent | Maidstone | churchyard | Yes | V - con | View On Map |
| Axminster | England | Devon | Honiton | churchyard | Yes | Notable | View On Map |