Fungus for ID, please

Fungus for ID, please

Observation - Fungus for ID, please - UK and Ireland. Description: A tiny fungus (~5mm in diameter, 8-10mm high) growing in compost has been dry for most of the winter and recently thoroughly wetted. Stipe seems to widen towards base. Only one specimen so I've not wanted to disturb it. I'll aim to get some more photos as

A tiny fungus (~5mm in diameter, 8-10mm high) growing in compost has been dry for most of the winter and recently thoroughly wetted. Stipe seems to widen towards base. Only one specimen so I've not wanted to disturb it. I'll aim to get some more photos as it matures.

Can anyone help with an ID, please?