Deadly poisonous - these will apparently sweat you to death! Very pretty though, and they pop up in big groups.

These impressive fungi pop up in big groups any all throughout the autumn and winter.

One of the two (the other is Coprinus comatus) fungi I have personally foraged and eaten! And I'm not dead yet!
I was confident foraging these mushrooms in particular because they are quite unique and have no close-lookalikes.
Younger specimens could be mistaken for other funnels, including the poisonous Ivory Funnel above, but more mature versions are unmistakable - and very tasty!