But to the Government it is an environmental vandal which has had its day. This week, the Department for Business published its energy White Paper, suggesting ways that it hopes Britain might become net zero carbon by 2050. Like it or not, your gas boiler is in its crosshairs. By the mid 2030s, the paper insists, all new heating systems will have to be low carbon or have the potential to be converted to a 'clean fuel supply' — meaning hydrogen. But just how realistic are the Prime Minister's plans to replace all our boilers? Is the timetable possible — or will the whole country end up paying the price for his impetuosity?