I need to move a picture light about a metre from its present location on an old lath and plaster wall. Unfortunately the room has just been decorated. The existing wiring seems to be running loose in the wall, but I can't guarantee it will reach the new location. Would it be OK to extend the existing by adding new cable to the choc blocks used to connect the existing fitting to the cable (or, presumably better, use a junction box that could be similarly hidden in the wall) and then hook the newly extended cable to the new location via a hole drilled for the purpose? The aim is to avoid breaking up the newly decorated wall.
Could I then add a second picture light by wiring from the relocated existing one?
Could I then add a second picture light by wiring from the relocated existing one?