Spotted a small patch of these chaps today. Wet ground next to a small stream in a patch of mixed Hazel, Ash and Oak in North Cornwall. I thought maybe Yellow Brittlegill, but didn't have a book with me so left them. Suggestions from another group so far, funnel cap or oakbug milkcap.
Tawny Funnel. "Funnel Cap" doesn't mean anything - or it refers to the whole genus of Clitocybe (literally "sloping head").