I am looking at putting a CCTV camera into our kitchen that overlooks the rear of the house and the rear patio doors. As part of a previous extension there is a void behind some plasterboard that has a double plug socket mounted on it and I was looking to put a trailing socket from the existing double socket as a power source for the camera PSU. Does the new socket have to be fixed to a wall or can it be left 'floating' in the void being the plaster board.

