Britse regering: 'The greenest government ever?'

Government's decision to put pollution standards 'on hold' raises possibility of dirtiest coal plants going ahead.

The coalition is watering down a commitment to tough new environmental emissions standards, raising the possibility of dirty coal-fired power stations such as Kingsnorth going ahead.

Green groups are aghast that a flagship policy called for in opposition by both Lib Dems and Tories, and which they last year tried to force on the Labour government, will now not be implemented in the coalition's first energy bill to be published this year. .

Introducing a so-called "environmental performance standard" (EPS) for power companies would have restricted greenhouse gas emissions from coal and gas plants and encouraged companies wishing to build to use more efficient technology.

The introduction of an EPS was personally championed by David Cameron, George Osborne and Nick Clegg when in opposition; their opposition to Kingsnorth became something of a cause célèbre – and even features in the coalition agreement – but was opposed by energy companies and Tory backbenchers.

The chief executive at one coal-plant operating company warned that the UK's renewable energy technology – which would be used to help new plants meet the target – was too undeveloped to make the EPS feasible.