Boris's wind power pledge won’t be cheap

Boris Johnson likes a big announcement. Back in his days as London mayor, he told us he was going to build a new airport on an island in the Thames estuary and a tree-lined ‘garden bridge’ further upstream. Although not as hare-brained as his more recent plan to build a bridge to Ireland, neither of these schemes ever came to anything.

Much of the government’s announcement today of a major green spending spree gives the impression of having been conjured up with the same lack of any serious intent, ‘smart cities’ being an obvious example. However, some of it looks positively alarming.

Take home insulation, for example. It sounds so simple and so easy, but as study after study has shown, the cost of retrofitting the existing housing stock is wildly expensive – the cost would run to trillions – and it might even be cheaper to knock down the whole of the UK’s housing stock and start again.