Can anyone identify this?

Can anyone identify this?

Observation - Can anyone identify this? - UK and Ireland. Description: I am not sure what mushroom type this is. It was nestled in Beech woodland and on open ground around it. I believe M3 is the underside of the same one as shown in M1. I would say the gills are crowded. Most of the specimens in open ground had a lot of dec

I am not sure what mushroom type this is. It was nestled in Beech woodland and on open ground around it. I believe M3 is the underside of the same one as shown in M1. I would say the gills are crowded. Most of the specimens in open ground had a lot of decay and were trampled.