Well thats something you don’t expect to see everyday. I managed to grab a picture of this grass snake with my phone as it was making a quick get away from the pavement by where we park by Abingdon weir.
I’ve never seen one before and was quite suprised that England is home to 3 foot snakes, especially in an urban environment.
According to Wikipedia they like to hang out around ponds and the like, eating frogs and toads, so it may have been hanging out by the streams and ditches by the car park.