been experiencing rollback on significant hills for a while. needed new brake discs and pads so had them fitted expecting the problem to resolve (pads were well worn, discs were corroded). had to stop on this particular hill today and i'm still rolling back. if i pull the handbrake to the max it holds, but is then difficult to release.the car was thoroughly looked over by a reputable mechanic and no other brake problems were mentioned, other than discs and pads.