Fungi id please

Fungi id please

Observation - Fungi id please - UK and Ireland. Description: About 45-50mm across and 30mm high.Coffee coloured with a black stem . Seems to have pores underneath, found on very wet ,old dead wood in deciduous wood.

About 45-50mm across and 30mm high.Coffee coloured with a black stem . Seems to have pores underneath, found on very wet ,old dead wood in deciduous wood.