Four different fungi, all on the same decaying beech tree trunk at Bowlees in Teesdale. Dead trees are a wonderful resource for fungi, mosses and many small invertebrates.
I think this is yellow curtain crust Stereum hirsutum , growing on the cut end of the trunk.
This is the young stage of the porcelaine fungus Oudemansiella mucida
... and here it is with the slimy caps fully expanded
... and this is another Stereum species, although I'm not sure which. This is a young stage .....
.... and this is the same at a more mature stage.
And finally, I think this is the many-zoned polypore aka turkey-tail fungus Trametes versicolor