It IS a local council run scheme, financed by government, but only a fixed sum in the pot up to end of March each year.
We used to have part C/H, but because my OH is on a disability allowance (DLA) and the house was deemed inadequately heated/insulated, we had a new condensing boiler and a new rad/pipework in each room. They only reused the main 'back to front' 22mm pipes. The not-so-old boiler was in working order! Possibly they thought it's capacity wouldn't be adequate. They also topped-up the loft insulation to 200mm and would have insulated the cavity walls, had they not already been done. The bathroom needs refitting, but I stopped them doing that, I felt that they had helped us enough. This was 2005, work authorised around June and completed by October.