These funnels were at the Copley Valley Development Site last month.
Apologies for the photos, taken in poor light.
The fifty-pence gives some scale.
I think Clitocybe geotropa.
They were with some very old, collapsing Black Poplars near the railway.
I looked for the Pithya vulgaris at Ogden water on 28th December, but saw no signs of them.