Thanks very much guys. Unfortunately the cable from the joint box to the master socket is only 2 pair & given that I apparently need 3 wires for the extension unfortunately the option to use the spare wires does not seem to be on. Nevertheless you have given me sufficient advice to think about...
Help needed. Before I call out BT at significant cost can someone advise me on a relatively simple (i.e. if you are not a telecoms idiot like me) problem.
Up until a week ago I had 2 BT lines, 1 into the house and 1 to an office in the garden. Having now retired I no longer needed the separate...