In reply to buzby:
> I move it a foot but other will be short,both lights and sockets.
> will he be able top create a connection above the ceiling and lengthen the cable or will it have to be renewed all the way back to the next proper connection i.e. socket or light fitting/switch.
Yes. Any competent 'tricky will be able to extend the wires. But, he/she will almost certainly make the join at a convenient cavity, i.e. either in the roof space, or under the floorboards - not mid-wall, unless it's a cavity wall or he's a complete bodger.