I have an existing centre of the room ceiling light operated by a 1 gang 1 way dimmer switch - the existing wiring in the switch is just red, black and earth. I want to add some wall lights and replace the single dimmer switch with a double dimmer - one for the centre light and one for the wall lights. Is it possible to run a 3 core lighting cable from the new wall lights directly to the switch and use a 2 gang 2 way switch with a wire connecting the common terminal of each gang to act as the power source for the wall lights? If this won\\\'t work, how do I need to wire the wall lights to use a double dimmer switch?