well it is a member of the pea family going by the flower and pod shape. as to which one I have no idea.

If its scrambled over other plants, like a climber, it might be Lathyrus latifolius, but it seems a bit late for that to be in flower.

I cant spot any tendrils so I wonder if its a type of broom. the stems do have a resemblance to cytisus or a member of the Genisteae.

Hi, I think it could be Lathyrus sylvestris, rather than latifolius, Derek.