Funding for loft and cavity wall insulation was called CERT. It started out pretty much for those over 65, disabled or on benefits. As more and more of those people had there’s done the utility companies started funding different groups of people until last year anyone could practically get it for free.
The CERT scheme finished last month and has been replaced by something called ECO and Green Deal. Unfortunately unless you are seen as being a vulnerable person you will not qualify for any loft or cavity wall insulation. The exception being…. if you live in an area that is in the lowest 15% of deprived areas in the country (then it needs to be part of a programme where others in the area are having the same work done). Or you might get loft insulation funded if you are having some solid wall insulation installed at the same time.
There’s a bit more fine detail to it than that, but it’s pretty much the gist of it.