You will probably have seen that many people have recently been poking fun at the Prime Minister over his list of things that were never threatened which he has pledged to stop.

Things like a tax on meat or compulsory car sharing. Or the one which has caused the most merriment, sorting our rubbish into seven bins. This is all good clean fun and of little real consequence. But one of the measures the PM wants to stop is of real and substantial consequence. He wants to stop ‘expensive insulation upgrades’.