| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| All Cannings | England | Wiltshire | Devizes | churchyard | Yes | Notable | View On Map |
| Alkincoats Park – Colne | England | Lancashire | Burnley | parkland | Yes | Notable | View On Map |
| Alice Holt | England | Hampshire | Farnham | woodland | Yes | Ancient 7m+, Lost, Notable | View On Map |
| Alfold | England | Surrey | Godalming | churchyard | Yes | Ancient 5m-7m | View On Map |
| Alesga | Spain | Asturias | Teverga Valley | churchyard | Yes | Notable | View On Map |
| Aldworth | England | Berkshire | Reading | churchyard | Yes | Ancient 7m+ | View On Map |
| Aldingbourne | England | Sussex - West | Chichester | churchyard | Yes | Lost | View On Map |
| Alderwasley Park | England | Derbyshire | Matlock | estate | No | Notable | View On Map |
| Aldershot | England | Hampshire | Aldershot | churchyard | Yes | Notable | View On Map |
| Aldermaston – Shalford Farm | England | Berkshire | Newbury | garden | No | Notable | View On Map |
| Aldermaston – churchyard | England | Berkshire | Newbury | churchyard | Yes | Notable | View On Map |
| Alderbury | England | Wiltshire | Salisbury | churchyard | Yes | Ancient 7m+ | View On Map |
| Albury Downs – Water Lane | England | Surrey | Guildford | footpath/road | Yes | Ancient 4m-5m | View On Map |
| Albury Downs – nr Chantry Wood | England | Surrey | Guildford | woodland | Yes | Ancient 4m-5m | View On Map |
| Albury – Harrowhill Copse | England | Surrey | Guildford | woodland | Yes | Ancient 5m-7m | View On Map |
| Albury – Estate | England | Surrey | Guildford | planted avenue | No | Notable | View On Map |
| Albury – churchyard | England | Surrey | Guildford | churchyard | Yes | Ancient 5m-7m | View On Map |
| Albourne | England | Sussex - West | Burgess Hill | churchyard | Yes | Notable | View On Map |
| Affpuddle | England | Dorset | Dorchester | churchyard | Yes | Ancient 4m-5m | View On Map |
| Adlington | England | Cheshire | Macclesfield | garden | No | Ancient 4m-5m | View On Map |