Hi

I am completing a project started before Part P came in with the
consent of my planning officer.

I have extended my upstairs lighting circuit by a couple of fittings
in the loft.

Workmen have been in and out and when I came back home today I found
none of the lights work.

The RCB hasn't tripped.

There is power (according to my detector) running through all lighting
supply cables and flex. That is true when switches are turned on and -
this is the weird bit - is also true when the switches are turned off.

i.e. the circuit seems to be in a permanent stat eon 'on', although no
bulbs light up.

Any ideas - I have disconnected everythign I can think of one by one
and still the problem persists!

Cheers

Rob