I have a landing light, I blew up the switch when I wired all the reds and all the neutrals. So I looked at the instructions (madness, I know). I have 3 cables, one of which is marked with blue tape, which I have assumed is the switching wire. I have gathered together all the lives, the two neutrals from the non-marked cables and the 3 earths.
I have added the switching wire neutral (well, black wire) to the bundle of live wires, hey presto, I have light. HOWEVER, it is just on. The upstairs switch doesn't affect it, and the downstairs switch doesn't affect it. No switching off possible.
So I spat my dummy. What have I done wrong? Help me, I am a fool.