Government auditors have slammed the ‘unacceptable’ delivery of the £1.5bn Green Homes Grant scheme which was supposed to help fund 600,000 green domestic retrofits but was ultimately closed this spring after paying out just £36m in vouchers.

A National Audit Office report released today concluded the scheme was delivered to an over-ambitious timetable and “not executed to an acceptable standard”, with NAO head Gareth Davies describing it as “rushed”.

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