DIY SOS ! Briefly, here is my problem. I had two 5 AMP single gang two way switches in my kitchen. I have bought two new 10 AMP single gang two way switches (brushed steel effect) from B&Q. Okay now for the confusing bit. When I removed both the old switches, I found that I had two insulated cores. One contains a black & a red wire (the black had a piece of red tape wrapped around it) and the other just had a red wire in it and an earth. Note that the earth wire is coming from both insulated cores (it is joined to both insulated cores). The red and the black (with the red tape on) went into L1 and L2 and the other red went into the Common. Similarily this was the case with the second switch (albeit the red and the black were in opposite L1 and L2 terminals) again with the other red in the Common. The light is more or less positioned between the two switches. The switch near the back door seems to have the main LIVE red in the common. I have tried fitting my new switches like the old ones but no joy ? I have tried all sorts of variations. I feel the 'single' reds should be in both respective Common terminals and the other red and black (with red tape on) should both be in the same respective L1 & L2 terminals. I can't fathom why they don't seem to work. Help !!! The diagrams I've found look different having yellow / blue wires..etc but I have a red and a black in one insulated core and another red in another insulated core in BOTH switches ? The old switches worked fine ?