Approx 3-4 cms.
No identification made yet.
No interactions present.
Not expert on this one but looks like it could be Ear Pick Fungus auriscalpium vulgare
The more I know the more I realise I don't know
We need a photo of the underside.
Sorry, should've mentioned it was gills on the underside and not spikes
Strobilurus tenacellus, based on the dark stipe. But the gills would help a lot, it may just be an ageing specimen of something else.
Lat/Lng: 52.9125, 1.2628
OS grid ref: TG194399