Amethyst Deceiver (Laccaria amethystea)
This is a lovely, delicate fungus of shaded woods where it can be quite abundant. It occurs else where but shaded woods, both decidous and coniferous, are the most likely place to find it. It is especially associated with Beech trees.
An autumn species,especially in September and October, it is most easily distinguished by its unique colouring and is probably the only mauve (or lilac) fungus to be found in the United Kingdom.
It is edible but has very little taste or smell so it is probably best left alone to delight others who may pass by later!