I saw this in my garden yesterday. I’m hoping it’s a grass snake but all the photos I’ve found online show yellow markings round the head area but this one had a white band round its neck. The rest of it looks like a grass snake I think, and I can’t find any other snakes that have a band marking except a fairly small American one. So I’m hoping all you gardening folk will be more familiar with grass snakes than I am. I just want to be assured it’s a native grass snake and not someone’s pet on the loose. The photo’s not brilliant but it caught me by surprise and was moving at a fair old rate.