Me three. Blackcurrant leaves smell blackcurranty if you crush them . They are a bit late, I picked all the ones I beat the blackbirds to in the middle of July.
I recently found out that flowering currant has fruit that looks very like blackcurrant, only a bit dusty-looking. They are edible, but not worth it, they taste of nothing much. That might be what you have there.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
That might be what you have there.
In the sticks near Peterborough