On Monday I received a call from a friend saying his cat had caught a grass snake and he did not know what to do with it. His cat kept on catching these snakes and could I help to release it somewhere safer. I brought it back to the garden and released it. It was about 18" long and about 1/2" in diameter. By the time we got back it was dark and I thought it would be best to release it straight away so I did not get a chance to examine it closely. Frankly, as it slipped off into the undergrowth I thought it would never be seen again.
Well today my wife sent me a text saying SNAKE! I knew exactly that she meant look at the pondcam immediately, so I did and there it was! I have put a print from the screen in the photo album, it's a bit pixellated but it is clear to me that it is the same grass snake.