Patrick Minford is a fellow at the Centre for Brexit Policy and led Economists for Free Trade, both of which have strong ties to the Global Warming Policy Foundation.

Steve Baker, who ran Suella Braverman’s failed Conservative leadership campaign and now supports Liz Truss, had the £2,000 ticket covered by Brexit Party donor Christopher Harborne.

MPs are whittling down the list of candidates for the next PM – but few are green champions.

Suella Braverman, Penny Mordaunt and Jeremy Hunt are also among Conservative party leadership candidates with direct or indirect links to the Global Warming Policy Foundation.

Advocates of climate action fear Conservative Way Forward's relaunch will galvanise the right-wing campaign being waged against Britain’s net-zero efforts.

Anti-fuel duty campaigner Howard Cox, who has downplayed “alleged man-made causes” of climate change, backed drivers who targeted roads across the UK.

The unsubstantiated claim has resurfaced in recent months as pressure has grown for the UK to embrace the controversial gas extraction technique.

Michael Hintze, an Australian hedge fund manager, will join several other climate sceptics in the House of Lords.

Businessman John Mappin, who has called Russia’s attack on Ukraine a “gift” to the world, is a vocal ally of fringe anti-net zero group CAR26.

A spokesperson for the British Retail Consortium said the phase-out of Russian oil could not "happen all at once".