Seen near the pools between conkers and spring cottage with otherwise mostly white examples but the pink shade seems to suggest the brittle gill
Assuming it was growing under Birch trees, it could be, but the britlegills are notoriously difficult to identify - you need to examine the spores under the microscope.
Think they were birches. The national forest sites seem to be overrun with them. Sence valley has areas of uniform rows which have a slightly grim air about them.
Buying a microscope a bit beyond my level of enthusiasm for identification
With fungi, it's always helpful to have pictures of the cap and detailed pictures of the gills and stem for identification. A slightly wider shot of the environment they were growing in can be helpful too.