They are gas safe registered and Oftec accredited, but this tactic of leveraging payment from an 85 year old is dodgy. It may have something to do with the fact that the boiler and fitting cost over £3,000 and that's about a grand more than I would have expected for her house size. As an option they offered her one for £4,000 too and that's just pulling wool over an older persons eyes.
Can't see any download and only a sentence in the T&Cs; (removed).
It was completed yesterday and I got the invoice 10 minutes later but no documents, certificates or guarantee papers - they want the payment first.