West Sussex,
United Kingdom 
PLEASE CAN YOU HELP IDENTIFY THIS FRUIT/TREE?
'FRUIT' IS PURPLE IN COLOUR AND ABOUT THE SIZE OF A CHERRY BUT SHAPE OF A VERY SMALL PLUMB - IS IT POISONOUS? - BIRDS DON'T SEEM TO BE TOO INTERESTED! MANY THANKS IN ANTICIPATION OF REPLY.
5 Aug, 2018
Answers
Either Damson as Bathgate says, or Bullace, a type of wild plum. The one on the left has signs of Plum moth larva damage to it.
5 Aug, 2018
certainly a plum family member. as to which that is down to foliage and flower form. they tend to be a bit on the bitter side.
5 Aug, 2018
Unlikely to be poisonous, and probably good for cooking even if not for eating raw.
6 Aug, 2018
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This looks like a purple damson plum. A small edible plum native to Britain. Welcome to GrowsOnYou.
5 Aug, 2018