| 05/05/17 | Red-throated Diver | Main Pit, Theale GPs | 1 | R H Stansfield |
15:00
| ad/w. Still present at 16:15 when I left site. First record in Berkshire for four years. Found by KEM from spit at western end of lake. |
| 05/05/17 | Red-throated Diver | Main Pit, Theale GPs | 1 | R H Stansfield |
14:30
| ad winter. Found by KEM, best viewed from canal side. Now confirmed. |
| 05/05/17 | Red-throated Diver | Main Pit, Theale GPs | 1 | R H Stansfield |
14:15
 | Found by KEM , best veiwed from canal side. |
| 05/05/17 | Red-throated Diver | Main Pit, Theale GPs | 1 | K E Moore |
13:45
| imm/non-breeding. looking from spit, across to buoys C /9/10, a diver sp.seen.Finally established to be Red-Throated , once we had gone round to canal-side/pillbox area. Thanks to RHS and BTB. |
| 15/11/13 | Red-throated Diver | Main Pit, Theale GPs | 1 | R J Burness |
11:00
| I saw a bird dive in the southeast corner that I thought was an RTD but couldn't relocate it again. |
| 27/04/13 | Red-throated Diver | Queen Mother Reservoir | 1 | M F Walford |
| Found by CDRH (per DJB). Permit holders only. |
| 26/12/06 | Red-throated Diver | Queen Mother Reservoir | 1 | M F Walford |
| birdguides.com. Permit holders only. |
| 27/02/03 | Red-throated Diver | Horton GPs | 1 | R Innes |
10:30
| On the working gravel-pit with the big crane just north of the railway. |
| 26/02/03 | Red-throated Diver | Wraysbury GPs | 1 | R Crawford |
| |
| 23/02/03 | Red-throated Diver | Village Pit, Wraysbury GPs | 1 | R Innes |
11:15
| Seen at both the north and south ends of the lake. |