Snowy Waxcap (Hygrocybe virginea)

Snowy Waxcaps are common fungi of short grass in fields and on commons, although they are edible they can also be confused with some of the most deadly poisonous fungi you may find, so you need to be absolutely sure of correct identification.  It is well worth buying a reliable book to find out more about fascinating fungi and how, for example, to take a spore print.