Nice find this morning. Lepiota mastoidea. Uncommon. The acute cone (umbo) in the centre of the cap and the thick white stem ring are the defining characteristics. Lots of other finds but lots of work yet to do on identification.
Prime fungi spotting time is upon us and there are some crackers about at the moment. Just walk slow and look everywhere. They are really easy to photograph with your phone camera so long as your back is supple but a bit of time spent with a DSLR on a tripod with a macro lens and remote release can pay dividends. Please leave them as you find them and don’t forget there are a number of species that can make you feel pretty sick and more than one than can be fatal if eaten. If in doubt, do not touch!