I've heard similar things about leaving the calling cards - the old joke was that they'd knock with a feather duster so as not to get heard. I work for a company in Hull who do boiler servicing/repairs. Our contracts have a high level of £13 per month and that covers the annual service and all repairs. Plenty of customers who switch can't believe the difference in price between us and BG.
We also are unimpressed with the way certain companies have switched to 'an annual safety check' rather than giving the boiler a proper service. Such corner cutting will inevitably lead to problems further down the line as the impurities that build up in the heat exchanger don't get cleaned away on a safety check.
If you're in the HU postal area by all means check out the details of our ServiceCare contract.
http://www.naturalgas...s.co.uk/domestic.html