Poor tree

On December 3rd I blipped some beautiful yellow fungi growing out of the bark of a Horse Chestnut tree round the road from me, well today I noticed this Horse chestnut tree was not only supporting a huge population of the yellow fungi, but a large population of these huge pinky / grey wavy bracket fungi as well!!!! these fungi were seriously big (about 8 inches across) and growing above my head about 6 feet up the trunk...poor tree!
I did feel for the tree, but I couldn't help be impressed with 'garden' of fungi it supported.
I have no idea which fungus this is, but I am always open to suggestions. I think it is beautiful, with it's wavy edge and lovely gills.
The tree already has buds for next season, lets hope it survives!