Spring fungus

Busy day today, as we have visitors arriving from Germany. They will be with us till friday. I noticed this clump of mushrooms growing in a planter in my garden some time ago, and haven't got round to trying to ID them properly yet. I'm hazarding some sort of Melanoleuca or trocholoma, but I need to get down and dirty with my microscope. The fact that they are so early should help to narrow it down.