This observation is part of a longitudinal study of common hedgehog activity in a Hampshire garden. Multiple observations of hedgehogs can therefore be expected throughout the night.
Frog found in a Pandanus plant, rather deep. I've looked through Glaw and Vences guide to the reptiles and amphibians of Madagascar and I can't see that it resembles anything in there except Platypelis tubifera, despite being much darker it does have a dorsal line.