Collins Complete Guide to British Mushrooms and Toadstools describes the Horsehair Parachute as "small but conspicuous parachute with a very long, horsehair-like black stipe. The cap is up to 1cm across, convex, becoming flatter and usually with a depressed centre; strongly radially grooved, furrowed and wrinkled; pinkish-brown but sometimes paler towards the margin. The gills are concolorous with the cap. The stipe is up to 5cm long, cylindrical, thin, tough and wiry and black. Its habitat is usually on plant debris, often heather and conifers, and is less often associated with deciduous trees". The examples in my picture were 20mm tall.
I think that this is The Deceiver (Laccaria laccata) ...
And this is Root Rot (Heterobasidian annosum), seen here growing on the roots of a connifer ...
... and its underside ...
