Blackberries?

I saw this grape-like plant in the front garden of a house near River Leam. It seems like blackberries but Im not quite sure. This is the first time that i have gotten close and personal with this plant if this is indeed a blackberry plant. I didnt know it is thorny. I was tempted to pick some of them but i decided not to in the end because i was already very dodgy taking very close shots of the berries so close to the wall and people passing by were giving me weird looks.