UK's climate change body to unveil emissions cut plans

Turner's group is also expected to advise how achievable is Britain's target to get 15 percent of its energy from renewable sources by 2020 versus 1.3 percent in 2005.

Investors in renewable energy like wind and solar power hope that if the report's proposals are implemented by the government, there will be more clarity.

"Broadly speaking it ought to be welcome to investors because it should set a playing field against which investments can start to be made with a medium-term perspective," said Ian Simm, chief executive of Impax Asset Management.

The report comes as 190 countries meet in Poznan, Poland, in December 1-12 talks to review progress in a two-year drive to agree a new global climate treaty by the end of 2009.