Most Conservative MPs, including at least six members of the shadow cabinet, are sceptical about their party's continued focus on climate change policies, it has been claimed.

The recent furore around "Climategate" has hardened the views of Tory MPs, many of whom were already unconvinced by the scientific consensus, and has led to increasing calls for the issue to be pushed down the priority list.

Tim Montgomerie, founder and editor of the ConservativeHome website, said climate change had the potential to be as divisive for the party as Europe once was. "You have got 80% or 90% of the party just not signed up to this. No one minded at the beginning, but people are starting to realise this could be quite expensive, so opinion is hardening."

Montgomerie said that while some MPs simply did not believe the science, others felt it would harm the economy too much to focus on policies to reduce emissions. "Some think, 'What is the point in taking all these decisions if India and China and others row ahead?' Nigel Lawson makes the point that 30% of Indian people have no electricity and the Indian government has to give that to them. The cheapest way to do that is fossil fuels."