Fruit of the blackthorn. Its a type of wild plum. Its grows all over the UK.

Defo not dangerous in the slightest. The Loony Juice may ferment a tiny bit, but the worse that'll happen is the lid will blow off and spill it everywhere.

Other good recipes are Blackberry Vodka or Cherry Brandy.

My cupboard is full of the shizzle I "forage". Got loads of weird booze, jams, chutneys etc...