| Answer | % Correct |
|---|---|
| Thames | 94%
|
| Tyne | 88%
|
| Mersey | 87%
|
| Avon | 86%
|
| Severn | 86%
|
| Clyde | 85%
|
| Trent | 84%
|
| Wye | 83%
|
| Humber | 80%
|
| Tweed | 79%
|
| Cam | 66%
|
| Arun | 56%
|
| Orwell | 56%
|
| Wensum | 51%
|
| Bann | 49%
|