| Abbeydale Observatory | Gloucester | — |
 Airdrie Public Observatory | North Lanarkshire | — |
 Aldershot Observatory | Rushmoor | — |
| Almalex Observatory | Ciudad de Leeds | — |
 Alston Observatory | Longridge | — |
| Altrincham observatory | Trafford | — |
| An Carraig Observatory | Newry | — |
| Appledorne Observatory | Farnsfield | — |
| Ascension Island Magnetic Observatory | Ascension | 177 m |
| Ascot observatory | Ascot | — |
| Astrognosis Observatory | Bradwell | — |
| Astronomy Centre | Todmorden | — |
 Bardsey Bird and Field Observatory | Aberdaron | — |
| Baxter Garden Observatory | Salisbury | — |
 Bayfordbury Observatory | Bayford | — |
| Beaconsfield Observatory | Penn | — |
 Biblioteca Pública de Airdrie | North Lanarkshire | 125 m |
 Bidston Observatory | Wirral | — |
 Binnhill Tower | Perth and Kinross | — |
| Bishopstoke observatory | Bishopstoke | — |
| Bradbury observatory | Stockton-on-Tees | — |
| Brisbane Observatory | North Ayrshire | — |
| Burwash observatory | Burwash | — |
| Castle Fields Observatory | Calne | — |
| Cheam observatory | Municipio de Sutton | — |
| Chelford Observatory | Chelford | — |
| Chelmsford observatory | Chelmsford | — |
 Chilbolton Observatory | Chilbolton | — |
| Church Stretton observatory | Church Stretton | — |
 City Dome, City Observatory, Calton Hill, Edinburgh | City de Edimburgo | — |
 City Observatory | City de Edimburgo | — |
| Clixby Observatory | North East Lincolnshire | — |
| Coastal Observatory | — | — |
 Coats Observatory | Renfrewshire | — |
| Cockfield observatory | Cockfield | — |
| Coddenham Astronomical Observatory | Coddenham | — |
| Colchester observatory | Colchester | — |
| Conder Brow observatory | Carnforth | — |
| Copeland Bird Observatory | — | — |
| Curdridge observatory | Curdridge | — |
| Cygnus Observatory | New Alresford | — |
 Cámara Oscura, Edimburgo | City de Edimburgo | — |
| Daventry Observatory | Daventry | — |
| Dun Echt Observatory | Westhill | — |
| Dungeness Bird Observatory | Kent | — |
 Durham University Observatory | ciudad de Durham | — |
| Earls Barton observatory | Earls Barton | — |
| Eastfield observatory | West and Middle Chinnock | — |