BORIS JOHNSON must be more ambitious if he is to deliver on his new pledge to have every home in Britain powered by wind-generated electricity by 2030, the Unite union said today.

During his keynote speech to the Tory Party conference, the Prime Minister raised the possibility of offshore wind power being used to heat homes.

He pledged £160 million to “manufacture the next generation of wind turbines,” which he said would create 60,000 jobs.