Adey: 2 stops less exposure would create a very dark image. The image is pretty much unprocessed, apart from a bit of sharpening, and some cropping. I reckon the camera got it about right, though maybe 1/3 stop less would have been better. The long exposure is due to rather cloudy conditions and shading from Gorse bushes. So much for BBC weather forecasts. The histogram looks fine with no burnout.
I have to admit to not being 100% certain of the id, having used the book by Brooks and Lewington, and compared the markings. Anything not resembling a mushroom is a challenge for me.
Leif