My OH just called and one of our friends has found a little black kitten in a bin bag, how anyone can do that, I'll never understand.
Anyway - he's not sure how old it is, he says its fits in the palm of his hand - but are there any other things to look out for other than the obvious like eyes still being shut. He would like to keep the kitten if it gets on with his current cat, but was concerned that it might need specialist care if it is still too young to have left its mum.