Growing in a damp corner,

I have no idea what sort of mushroom/toadstool these are. Given my knowledge of such things, I work on the principle that if it's not found on a shelf in Tesco, then I'm not going to risk eating it! If anybody can tell me what they are, and more importantly, if they are edible, I would be grateful.

There are a few more 'mushroom type' things growing around the garden, time and light permitting, I'll try to capture a few more over the next few days.