David Miliband backs calls for emissions performance standard

David Miliband yesterday attempted to win over green voters in the race for the Labour leadership, confirming he supports proposals for an emissions performance standard (EPS) that would effectively ban construction of coal-fired power plants without carbon capture and storage capabilities.

The move will put pressure on his brother and main leadership rival, Ed Miliband, who opposed the policy when he served as energy and climate change secretary.

The coalition has vowed to introduce an EPS, but has been accused of dragging its feet with the plans by putting the proposals out for consultation rather than including them in its upcoming energy bill.

David Miliband's intervention could help to drive environmental issues up the agenda as the Labour leadership race entered its final three weeks.

Supporters of Ed Miliband responded to the move by questioning David's green credentials following his support for the proposed third runway at Heathrow.

Ed Miliband opposed plans for a third runway in cabinet, but ultimately gave his blessing to the plans after receiving reassurances that the expanded airport would not be allowed to breach air pollution rules.

Both brothers have headed up environmentally focused departments and have played a key role in the development of the UK's climate change policy over the past five years. They have also led Labour's opposition to some of the coalition's environmental policies, accusing David Cameron of indulging in " greenwash" with his commitment to creating the "greenest government ever".

Miliband's support for an EPS may prove significant if, as polls suggest, he secures the Labour leadership. He would then be in a position to increase pressure on the coalition to fast-track the plans and deliver on its commitment to introduce an EPS next year.