I think we are looking at Phlebia radiata or P. livida - however identity needs to be confirmed.
Here's an arguably attractive fungus that I found growing on the shady NE side of a large hornbeam that was felled in spring 2005 (it was a lovely specimen tree too?). The main fungus mass measures approximately 180mm top to bottom.
Bruce
The whole fungus

This is a medium close-up measuring about 50mm across

This is a crop from photo2
