Fox Moth caterpillars at Minsmere, along the path between the beach and the scrapes. I think my previous sighting of this species was on Raasay in the Inner Hebrides. I see these caterpillars are sometimes found on the beach. You can watch one moving if you follow this link. You can see a photo of the Fox Moth here.
Incidentally, if you know your hairy caterpillars, you might be able to help with identification here on the Cabinet of Curiosities blog.