If the master is fed via a lot of internal cable(eg its at the other end of the house to the external cables entry point)then following new guidlines,there is everychance they will just install a new master socket where cable enters into property, thus making your existing internal wireing your responsibility as it s now after the master socket.they might then tell you they will renew it but at a charge.and more than likely not at that visit as exsessive internal wireing needs to be agreed with trc first.
