By Adam Vaughan

Amber Rudd cites Margaret Thatcher’s action on global warming as she says tackling climate change cannot be left to just leftwing politicians

The challenge of how best to tackle climate change must not solely be the preserve of leftwing politicians, according to the UK’s energy and climate secretary.

Amber Rudd, who was promoted to secretary of state in May, is to use her first major speech on climate change to argue that the Conservative party’s legacy of action on global warming dates back to Margaret Thatcher.