Yes, definitely, possibly, maybe. Or not as the case maybe. Big Blackcurrants? If the leaves have no scent to them then Jostaberry.

Well, the leaves aren't scented.there's a really good garden centre not far from me, might take a cutting there and see if they can identify it for me. Thank you very much for your help!

If not scent then definitely Jostaberry. Only concern as I said before is the lateness of them.