Under the ECO4 scheme, that would include ASHP.
Im ok with that side of it, its the wall insulation that is my biggest concern. The front half of the house is a typical stone built, non DPC welsh cottage 900ft up the side of a hill. With a cavity wall extension.
If these are not done right, it not an easy job to fix, by me or anyone.
Then theres other issues like it currently pointed, internally with cement, which means wall are damp. Theres obviously no chance they will sort that, so need to do that first. Which i always intended to.
In short, its all rather complicated at a practical level, but what you sayis certainly valid and something im pondering.
As for building control, my view remains the same. Indeed, if the latest report linked above is anything to go by, building control oversight seems to be mostly absent given the work done in most cases is notifiable.
But not my problem if someone else is doing the work. Ill be more use than building control in keeping tabs on the work.