Nick Martin, a construction expert on green building techniques, warns: "This is not the same thing as fitting a satellite dish. The lateral thrust exerted by these turbines on a Victorian chimney stack in a high wind would be more than sufficient to topple it. The same might be true of the gable ends of many older buildings."

Pity, isn't it? But it looks as if wind turbines, in a city at least, don't provide much power, and can even damage your home.

David Cameron and the battle for wind [March 6]