he can't just disconnect it cos it'll need to be re-joined to complete the ring again, like has bee said above is it a converted house or a proper purpose built flat, if it's a house and it's upstairs it's going to be the easiest to fix cos the wiring should go into the loft, i can instruct you on the best thing to do but not without more info on where it is and what type of building also how many SET'S i.e red black or brown and blue wires are going into it, if it's just one set of wires find a socket that is close to it and you should find 3 sets inside that socket one will be feeding it the other 2 will be for the ring, that's about all i can do to help atm without more info