Blackberry or, as they call them up here, brambles. Treat them like raspberries and cut out the canes that have fruited this year leaving on the new cane that haven't yet fruited, those can be pruned to 5 - 6 foot in length.

Wish I could see the berries closer up. If they are shaped like Gooseberries then they possibly could be Jostaberry. If the bushes are very spiny then they could be Worcesterberrry.

Looks like Blackcurrant to me going by the fruit and leaves.

Thanks! Moon grower, I know what the blackberries are :-) huge of them!
Owdboggy, just looked at some pictures of jostaberries... I think you may have hit the nail on the head :-) exact match of leaves and berries! Thank you so much! Never heard of then before!

Jostaberries are a new one on me - appear to be half way between Gooseberry and Blackcurrant according to Wiki. Let us know if they taste any good!

Well do! Yeah, I googled it to, time will tell, they're still quite small :-)

All these hybrid berries I wonder if they crop as well as the originals?

The only thing is that they should be well over by now, we picked and jammed ours about 3 weeks ago.
I think they taste good. Cropping is funny, last year they were loaded, this year not so good. Blackbirds adore them too.

MG My Mum had a gooseberry/blackcurrant cross called Worcesterberry and it cropped stupendously and was delicious.

Strangely Worcesterberry is now thought to be a straight species, Ribes divericatum. We had it, but it is so dreadfully prickly that we got rid of it. There is no discernible difference in taste (to us at least) from Josta, so no loss.