We have an awkwardly placed radiator which we are having to move by about 15 inches . However doing this would also require moving a double socket 15 inches. The wall is an external breeze block and plaster wall. Can I just create a new socket opening 15 inches to the left of the existing one, and run cable in conduit buried in the plaster as a spur to the old socket; using wagos as connectors in the old socket box and putting a blank plate on the old socket box? Grateful for advices.