A UK-based climate change denial think-tank has been caught making serious misrepresentations on climate policy which go against the guidelines of the UK's charity regulator.

The Global Warming Policy Foundation, set up as a charitable organisation by former UK Conservative finance minister Lord Nigel Lawson, has been gaining traction in some media outlets who are turning to the foundation in an apparent attempt to "balance" their stories on climate change.

But in providing balance, Bob Ward, policy and communications director at the Grantham Research Institute on Climate Change and the Environment at the London School of Economics and Political Science, shows those media outlets are also helping to spread mistruths.

Writing in The Guardian, Ward looked back on public statements and media interviews given by Lord Lawson since his foundation was launched in November 2009 and found at least five examples where the public had been misled.