Rigidoporus ulmarius, perhaps near Cobham Woods

 

This is - I think - the quite decayed pore surface of a Rigidoporus fruiting bracket. The surface seems to have the notable shallow pore layer with the typical cinnamon-orange colour coupled with the very bright white flesh (big clue!) typical of these brackets according to the TMA app.  

Host tree unknown.

Only a guess, as there is not much else to go on.