hard to tell really as the wires at the back of the wall
looks like i have 2 sets of wires here for some reason
i just remember when the wires came off the switch the 2 black ones was joint together, i had to change the back box as it was not attached, and one of the screw holes had snapped...
i have changed over the old cover well we had plastering done
and its been hanging on with one screw
since the plasters got behind it etc
anyway the wires dropped off when i came to replace it
its earthed to the back box
but i am left with 2 red wires and 2 black wires
i have tested...