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Hi Thanks for your reply,I haven;t as yet removed the existing switch its wired in the sequence of red,red,blue at the top. black & yellow at the bottom. And yes one of the switches works two ways I also have a single switch near my garden door. Both the 2way & single switch have a single...

Hi I have a 2 gang 2 way light switch & want to fit an electronic dimmer, the wiring inside are 2 red wires, 1 black, 1 blue, 1 yellow and the green/yellow I'm guessing this is the earth is wired to the metal box in the wall. On the dimmer there are the symbols L (2 of them) Sw and the two...