Got there in the end, thanks.
ceiling rose L-R
1-Landing light - blue
2-Single core from bottom switch - red
4-Bathroom light - red
5-Bathroom switch - COM - red
6-Bathroom light - black
7-Bathroom switch - L1 - black
8-Landing light - brown
switch.
Thanks all for pointing me...
I have a rudimentary understanding of electrical circuits, enough to work safely at the least. What I don't understand is why the single core runs from the bottom switch to the upstairs ceiling rose and not the upstairs switch, and why the upstairs switch has both COMs shorted. This is also why...
Just finished plastering and decorating hall/stairs/landing, decided to change all light switches and ceiling roses, thought it would be straightforward, so started disconnecting upstairs ceiling rose and 2 gang/2 way switch to replace with new (without noting original wiring :oops: )...