am sure that means a lot to you mate,
is it just one light?if it is,i doubt its a borrowed neutral,we norm wire light circuits on two rings,ground floor and top floor,and that means,if the neutral is wrong,all the lights would go out.
on that zone,check the bulb,
MM
February 2011
It's probably got a borrowed neutral, which should have been uncovered before the unit was changed.
Adam
January 2011
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix switches and sockets.