Thanks Mark who found out what it is

Found this mini-beast climbing trying to climb up the side of the bird bath yesterday so there was great excitement! It was ‘saved’ from drowning and put on the path (which looks mountainous here) for a photograph.It was very lively! I haven’t seen a caterpillar all summer and I know this one is out of season. But I don’t know what it is.I would love to know…..? Took six shots. This shot turned out to be the best and is worth pressing to see more (amazing) detail. About 4 cms
Gill McGrath©