Labour is being warned it is hurtling towards a “powder keg” confrontation with environmentalists, green groups and a swathe of its own supporters in the next few weeks, amid its claims that “blockers” are standing in the way of economic growth.

A flurry of pro-growth measures have been announced by ministers in recent days as part of a government fightback against claims that the economy is stalling.

The drive culminated last week in chancellor Rachel Reeves’s assertion in Davos that economic growth is more important than net zero. She is now on the verge of effectively giving her backing to airport expansion at Heathrow, Gatwick and Luton.