Another ex grass snake

This the third time I have found a dead grass snake - all of them largish adults. It is perhaps good news that they clearly are resident here despite lack of suitably sized ponds around although next door has a small one. I have also seen live ones it's fair to say. This one had bad injuries and the obvious explanation is that I had been cutting the field earlier a few metres away. Next doors cat was also around and there are other candidates as I did see an animal run away from the site of the snake but couldn't tell what it was - cat, stoat??