Blushing bracket fungi are quite common growing on dead or dying trees, especially willows. They cause white rot, so will have contributed to the state of the trees. Potentially visible all year round: the fruiting bodies are woody and long lasting. But probably most likely to be noticed in winter. The “blushing” refers to the reddening which sometimes affects areas of the surface.
Growing on a (dead) tree beside the Stratford on Avon footpath known as Anglers Walk, which heads upstream by the river in an area which has recently been developed as a local nature reserve. Blushing bracket fruiting bodies have been growing on the tree for several years.