Giant polypore Meripilus giganteus on an old tree stump. Two more photos below.
Chicken-of-the-woods Laetiporus sulphureus on an ancient sweet chestnut.
A second specimen of chicken-of-the-woods on the same tree.
I think this, high up on a white poplar stump, might also be chicken-of-the woods, but it was quite withered. Wish I'd seen it in its prime.
Beefsteak fungus Fistulina hepatica on an ancient sweet chestnut