Guys, any help much appreciated.
Old Victorian building set over three floors, a dozen bedrooms. Ground floor and 2nd floor absolutely fine.... all of a sudden the four bedrooms lights on 1st floor aren't working. (shaver lights in each ensuite WORK and so do lamps and small lights fixed on wall over bed.)
It's just the MAIN ceiling lights that are out in all five 1st floor bedrooms (and two in hallway directly outside.)
Anyway - found the boards.... there are two....neither of them had tripped....
Took the fronts off and there are 8 switches on each board.... each labelled...'ground floor lights'....'1st floor rear'....etc etc..... so I made sure I located the one saying '1st floor bedrooms'..... the fuse wire was ok on that one but - strangely - it had been broken on one next to it.... anyway, I carefully replaced the wire on the faulty one with the new (correct size) wire... I still thought it strage that none of the switches had tripped???
Anyway, turned switched it all on again ran upstairs and STILL none of the main bedroom lights work. And, yes, I have tried changing the bulbs
IT'S DRIVING ME MAD!!!! Can anybody PLEASE tell me what on earth is wrong???