Having been on a quick fix in factory in Wakefield and on a way home for the night stopped in Maltby because the two way switch wasn't working. Nobody in, downstairs lights MCB off, so I have tested wire coming out of the switch with for continuity against the earth (AC light lit-up), but not enough to Display value and I got a hardly noticeable kick(touch) from the radiator. Apology for the stickers, but as I have went only for a switch I haven't brought the testing (locking )kit or proper condemn stickers.
Strait for the main-switch off and what I have seen when I have looked at fusebox properly:
-There is a case when access for the finger to live bush-bar is not the worse problem by far
-there is a case when 6mm meter tails are not the worse problem even if they are supplying the electric shower on 10mm cable and are connected on 100Amp incomer fuse.
-there is a case when neutral being shared between both lighting circuit is nowhere near the worse problem here. lets see if you spot the largest issue here. (description have hinted it)