What I think is Phlebia radiata growing on the underside of a branch cut from a cherry tree.
I took the above specimen and from it obtained the spores shown below:
The field width is about 86um so the spores are about 3.5 x 1.5um. This is a bit shorter than the figures around 4-6 x 1.5-2um which are given in most sources, however, it does fall within the 3.5-6 x 1.5-2um given for P. radiata half-way down this page on P. rufa.
First photo and specimen taken in Whiteknights Park, Reading, UK, on 2013-11-17.