From my walk yesterday afternoon: what I think is an amethyst deceiver mushroom (Laccaria amethystina). (The 'lump' above it is probably a small birch polypore.)
The gills look like this:
There were also many small ones like this in the area:
Photos taken in the Wilderness, Whiteknights Park, Reading University grounds, Reading, UK, on 2011-09-08.