The Natural Philosopher wrote:

The electrician who came (via a call to teh letting agency) simply
chased the wire out, and crimped on a new bit. We wrapped it all in
insulation tape and I plastered it back where it came from.

Yes, it was in the end that simple.

from my experience of such circumstances, Damage to drill
bit/screw/driver is far vorse than cable damage.

With RCD cable damage is often nothing more than slight loss of sleve.

chase out onough wall to get a few turns of good insulation tape around
mising sheath then plaster back in. I'd be inclined to patch up existing
cable than cut out and crimp a new piece in.


--
http://gymratz.co.uk
The Worlds No1 Fitness & Gym Equipment/nutrition specialists.
http://www.water-rower.co.uk
The ultimate rowing simulator.