| Eastwood Observatory | Leigh-on-Sea | — |
| Eden Observatory | Banham | — |
 Erraid Shore Station | Argyll and Bute | — |
| Eskdalemuir Magnetic Observatory | Dumfries and Galloway | 245 m |
 Eskdalemuir Observatory | Dumfries and Galloway | — |
 Fair Isle Bird Observatory | Islas Shetland | — |
| Filey Bird Observatory | Filey | — |
| Flamborough Bird Observatory | — | — |
| Fosseway Observatoy | Radstock | — |
| Galleywood observatory | Galleywood | — |
| Gedney House Observatory | Kirton | — |
| Gibraltar Point Bird Observatory | — | — |
| Glasgow observatory | Ciudad de Glasgow | — |
| Glentower, Auchintore Road, Fort William | Highland | — |
| Glyn Marsh Observatory | Isla de Man | — |
| Godalming observatory | Godalming | — |
 Godlee Observatory | Mánchester | — |
| Golden Hill Observatory | Sturminster Newton | — |
| Gothers Observatory | St Austell | — |
| Grantham observatory | Grantham | — |
| Gravesend observatory | Gravesham | — |
| Great Shefford Observatory | Great Shefford | — |
| Greenmoor Observatory | Woodcote | — |
| Greens Norton observatory | Greens Norton | — |
| Greenwich Park magnetic observatory | Municipio de Greenwich | — |
 Hakin Observatory | Milford Haven | 49,4 m |
 Hampstead Observatory | Hampstead | — |
| Harrow observatory | Municipio de Harrow | — |
| Hartland Magnetic Observatory | — | — |
| Hartley Wintney observatory | Hartley Wintney | — |
| Hartwell observatory | Hartwell | — |
| Haverhill observatory | Haverhill | — |
| Hemingford Abbots observatory | Hemingford Abbots | — |
 Herstmonceux Science Centre | Herstmonceux | — |
 High School, Academy Road, Stirling | Stirling | — |
| Highworth observatory | Highworth | — |
| Hilbre Bird Observatory | — | — |
| Holme Bird Observatory | Norfolk | — |
 Hoober Observatory | Yorkshire del Sur | — |
| Isle of Man observatory | Foxdale | — |
 Isle of May Bird Observatory | Fife | — |
| Kempshott observatory | Basingstoke and Deane | — |
 Kew Observatory | Richmond upon Thames | — |
 Kielder Observatory | Kielder | — |
 Kinnordy House | Angus | — |
| Kinver Observatory | Stourbridge | — |
| Lancaster observatory | Lancaster | — |
| Languard Bird Observatory | — | — |