Leaderboard

Problem solved, however, not by the original garage that caused the problem or by the Jaguar dealer who fitted the new master cylinder but by my local Renault dealer, thanks to a neighbour whose daughter works there. It took five hours of detective work, the ABS was found to be working normally, as was the Brake servo but on examining the new master cylinder they found that it was not the correct one for my car and a pin or plunger or something did not fit correctly into the servo, so they cut 2mm off the end and problem solved. It's Renault servicing for me from now on.