The Fire-Milk Lactarius

Description:

Milk plentiful, white and unchanging (although I didn't have a white piece of cloth to see whether it changed). Milk burned my mouth like hot chillies but it also dried my tongue up like sloe-berries do (acrid?) to the point where I think I can still feel the effects now after 8 or 9 hours. I'm unsure whether the burning sensation was just due to 'uber-acridity' or some other chemical in the mushroom? Biggest ones were around 15-20cm across. There was birch fairly close by but the closest trees were something like Hazel? (see last pics). Thanks wildaboutbritain.co.uk for the ID

Notes:

ai7