I live in a c2005 Taylor Wimpey home and it has 2 of these blanked off things - 1 in the dining room and 1 in the lounge. Both are near live sockets (approx 3-4 feet away) and at the same height so I would assume they are connected to the mains circuit.
My question is what are they and can they be converted into sockets?
My question is what are they and can they be converted into sockets?