Not strictly speaking Flora, as fungi are not plants (in fact they are more closely related to us!), but here goes anyway...
Spotted quite a few of these beauties up on the side of Hampsfell recently. They are Parasol Mushrooms (Lepiota Procera), and apparently they are delicious - although I couldn't bring myself to destroy such a beautiful thing. The largest was almost 10" across, as measured by the graduations on my walking pole.