Sadiq Khan calls on Reeves to bring ‘authentic’ Labour budget that boosts green investment

London mayor says government should stay true to its beliefs and face down those who claim net zero adds to cost of living

Keir Starmer's government has shown a lack of confidence that it has the answers to the country's problems, the mayor of London has said, as he called on the chancellor to back green investment in this month's budget.

Speaking on the eve of a summit of world mayors in Rio de Janeiro, Sadiq Khan said the Treasury should be more supportive of the energy secretary, Ed Miliband, in his pursuit of the government's target of an 81% reduction in greenhouse gas emissions by 2035.