Strange creature near Prawle Point, Devon

Strange  creature near Prawle Point, Devon

Observation - Strange creature near Prawle Point, Devon - UK and Ireland. Description: http://www.youtube.com/watch?v=rSDiJA1b1zM shows a video of this insect creature seen today at Prawle Point Devon near the coastal footpath. It looks a bit like a large woodlouse. I did not count the number of legs though. Size about 1.5cm long with a s

http://www.youtube.com/watch?v=rSDiJA1b1zM shows a video of this "insect" creature seen today at Prawle Point Devon near the coastal footpath. It looks a bit like a large woodlouse. I did not count the number of legs though. Size about 1.5cm long with a slightly iridescent wrinkled outer shell. Coiled up like a woodlouse when touched with reddish underside. Can you help identify it please?