The underside lacks the gills of many of the familar mushrooms and introduces me a different group of fungi with pores. This fungus was very tough and it occurred to me that it could be a species of Polyporus, which are reported as reasonably widespread and common.
The Dryad's Saddle, Polyporus squamosus has been smashed and all the mushrooms removed from the front garden in Mill Hill Road. The photographs below show the underside and the stipe (stem).
Report and Image
A huge toadstool has grown on a tree stump in Mill Hill Road, Old Shoreham. It measured 45 cm in length. This is the Dryad's Saddle, Polyporus squamosus, and it has been seen before in the same location. The books record usual sizes up to 30 cm only, but there have been reports of up to 60 cm.