Thanks for resurrecting this one with such an interesting comment Mal. As seen in the
Gallery comment Mykonik put this down as a coloured form of
M. pura but I was never convinced and now checking with FoS ('very rare') I see much evidence, macrosopically speaking, to support what you have proposed. Guess I'll never know? But I remember the exact location in a pine section of Minley Wood so come the autumn I'll be on the look out again - shame I wasn't alert to it last year .
Cheers
David