[Stuart]

In fairness, a friend of mine lived with some other friends in a townhouse (actually, IIRC it had four floors, not three) had a plumber in fixing the radiator in her bathroom. The bathroom was above her bedroom. A few months later, her bedroom ceiling collapsed onto her bed. She ended up having to replace some clothes, dry all her others, and replace her bed.

Luckily, in her case, the plumber had been employed by her landlord (the Ministry of Defence), so her costs were paid by insurance.

So, NTL aren't the only company that employ people who can do a lot of damage with drills.