Posted: 24/04/2012 at 15:48
Thanks for your comments.
@oldchippy - so that's where he is! I hope you're looking after him. He can get quite aggressive in spring.
@Margaret5 and @fieldfest - my mum once had a rat in her compost and made me evict it, on Boxing Day! She said it was my fault as I made her garden more wildlife friendly but all she got was rats and wasps. Still, it was the only rat I've seen in a compost bin in 20 years of composting...
@happymarion - I think they like warm heaps, so it would make sense that a new heap is more attractive to slow worms as it's breaking down. I am very jealous of your slow worms!