Rishi Sunak looks set to weaken key climate pledges in a move that has drawn heavy criticism from Tory MPs and environmental groups.
The prime minister said he remains committed to the net zero target by 2050 but will achieve it “in a better, more proportionate way”.
It comes after a report in the BBC said that as part of a major policy shift, the PM could weaken the plan to phase out gas boilers from 2035 and delay the ban on the sale of new petrol and diesel cars – currently due in 2030 – by five years.
It sparked anger among Tory MPs, with one telling Sky News they are “seriously considering” a no confidence letter.
However, in a statement on Tuesday night, Mr Sunak said: “No leak will stop me beginning the process of telling the country how and why we need to change.
“As a first step, I’ll be giving a speech this week to set out an important long-term decision we need to make so our country becomes the place I know we all want it to be for our children.”
Giving a flavour of what is to come, the prime minister added: “I know people are frustrated with politics and want real change.
“Our political system rewards short-term decision-making that is holding our country back.
“For too many years politicians in governments of all stripes have not been honest about costs and trade offs. Instead they have taken the easy way out, saying we can have it all.
“This realism doesn’t mean losing our ambition or abandoning our commitments. Far from it. I am proud that Britain is leading the world on climate change. We are committed to net zero by 2050 and the agreements we have made internationally – but doing so in a better, more proportionate way.
“Our politics must again put the long-term interests of our country before the short-term political needs of the moment.”
Mr Sunak has previously hinted he is prepared to water down climate policies that add extra costs and “hassle” to households.
It came after the Tories’ unexpected victory at the Uxbridge by-election, which was credited to their opposition to the ULEZ congestion zone charge scheme.
Since then some Tory MPs have argued the party should drop green policies that could impose costs on consumers to gain votes at the ballot box.
But others are concerned it will damage the UK’s reputation on climate change.
Tory MPs are particularly angry about the reported change to the car policy, with one calling it “anti-business” – given how much the car industry has invested in Electric Vehicles (EV).
They told Sky’s deputy political editor Sam Coates that a push back on the petrol and diesel ban would mean breaking a promise the prime minister made to them privately.
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