The thing is, anyone advertising theselves or a buissness in any feild, if you go to them they have a proffesional duty of care. You as customer are relying on their 'best advice and practice' if they fall down , especially on saftey related matters, then you should sue. The small claims court can handle , if I remember correctly claims up to £5,000. This is a civil matter so unlike a criminal matter can be insured against. I know this C*** as I have to have negligence insurance for my horse work.
AND no Degsey, touch wood mate, never had to claim on it! :-D