I believe we have lots of these bushes in our apartment gardens, I think I have have identified it as above, leaves resemble holly and right now they have a very heavy crop of berries on that are very similar to blueberries, they even have the dusty look.
Googling tell me they can be used for jam and taste a bit like black currants.
Is there anything else that looks similar that may be toxic.
Help appreciated, they are loaded with fruit.
XX Jeannine