C.U box is in kitchen. Downstairs lights are -kitchen, toilet ,hall,living room. X2 twin and earth coming out of living room ceiling, borrowed a quality multimeter to test the switch live, got continuity across L & N with switch in on, nothing when off .connected as per posts on here and still nothing!!! There is an outdoor light on this circuit that will work with breaker, if I isolate breaker, it doesn't! Behind the living room switch is blue red earth ( so not looped)wondering if next course of action is to check connections on all downstairs lights, but worked fine before his attempt!! Sorry if I'm late getting back as im on nights this week so not much spare time! Will re attempt any suggestions on Saturday, thanks in advance