Thanks for that v interesting: I quote from your link:
"If a person carrying out building work contravenes the Building Regulations, the local authority or another person may decide to take them to the magistrates' court where they could be fined up to £5000 for the contravention, and up to £50 for each day the contravention continues after conviction (section 35 of the Building Act 1984). This action will usually be taken against the builder or main contractor, and proceedings must be taken within two years from the completion of the work. Alternatively, or in addition, the local authority may serve an enforcement notice on the owner requiring them to alter or remove work which contravenes the regulations...."
In reality though - who is going to be checking the trvs/ stat/ zones are all installed as required?
These things add a lot to the bills of the poorest people in small homes and I personally doubt the cost saving benefit of them in very small homes, flats, terraced houses.... That's why our company rarely work in these homes - we can't afford to. We quote by the book - and declare our income for tax/vat - so we just can't compete with much smaller quotes. And I know some of the customers just can ill afford the cost of replacement boiler....