I am familiar with how looping in at the switch on a lighting circuit works, i.e. all three neutrals connected together, all three earths connected together, live in and out in com and live to light in L1. But in a double switch how is this done. There will be an in and an out and two light cables. Is it all four neutrals connected together, all earths connected. The light lives will still be in the two L1s, but what about the live ins and outs. Does one go in each com and a bridging wire put in, which I believe would work.