Take-up figures for the Birmingham Green Deal programme show that out of 680 house assessments, only one home signed up to a Green Deal plan.

Carillion, which is running the £1.6bn Birmingham Energy Savers scheme, is the first Green Deal provider to reveal detailed numbers on the scheme’s take-up.

Carillion reports a conversion rate below 15%, massively short of the government’s estimate that one in three people asking for a Green Deal assessment would go through with a Green Deal.

The news comes ahead of the first official figures on national Green Deal take-up, which is due to be released by DECC on Thursday.