Liz Truss has extended her lead over Rishi Sunak among Tory members, according to a new poll, after the foreign secretary U-turned on a plan to link public sector pay to regional living costs.

On Monday night, the leadership race frontrunner said she would save £8.8bn by introducing regional pay boards instead of national ones to set salaries for civil servants, reflecting where they lived.

But experts warned that to reach the sum, the plan would have to branch out further than government departments, with the likes of teachers, nurses, and police officers also receiving lower pay than workers in the South.

It led to outrage from Conservative MPs, and by lunchtime today – less than 24 hours later – Ms Truss’ team had released a statement saying the policy would not be taken forward.

Politics Hub: Sunak allies attack Truss public sector pay plan

A statement insisted “current levels of public sector pay will absolutely be maintained”, adding: “Our hard-working frontline staff are the bedrock of society and there will be no proposal taken forward on regional pay boards for civil servants or public sector workers.”

Team Truss also claimed there had been a “wilful misrepresentation” of the policy, but former Tory whip Mark Harper said they should “stop blaming journalists” for reporting on the details in her own press release.

A Team Sunak source pointed to comparisons made between Ms Truss and former PM Margaret Thatcher, twisting her famous phrase for today’s events: “The lady is for turning.”

While the influential Tory mayor of the Tees Valley, Ben Houchen, told reporters the policy would be “a sure-fire way to lose the next general election”.

The first major error from Ms Truss’s campaign came as Mr Sunak battles to make up ground during what is a key week in the contest for the keys to No 10.

But the day ended on a high for Ms Truss following the publication of the latest YouGov poll of Conservative members, which shows she has extended her lead over Mr Sunak to 34 points in the Tory leadership race.

The survey, carried out for The Times, finds that 60% of party members are now saying they will vote for the foreign secretary to succeed Boris Johnson as prime minister.

This is compared to just 26% for former chancellor Mr Sunak.

The poll, carried out over the last five days, shows that Ms Truss is now ahead of Mr Sunak among all age groups, across different parts of the country and with men and women.

The only category where he beats Ms Truss is among Tory Remain supporters.

The YouGov survey published today also found that almost nine in 10 Conservative members have now made up their minds how they will vote ahead of ballot papers going out this week.

But it will concern both potential next leaders that more than 50% of party members believed that whoever was elected to succeed Mr Johnson would lose the party its majority at the next election.

Just 19% of members thought Mr Sunak could lead the Tories to victory, while 39% thought Ms Truss could see off a challenge from Labour.

As the leadership race continues to heat up, candidates Mr Sunak and Ms Truss will once again face the cameras this week on Sky News.

Taking place on Thursday 4 August at 8pm at Sky Studios in west London, The Battle for Number 10, will see the candidates take part in back-to-back questioning from the live studio audience made up of Conservative Party members who remain largely undecided on who to vote for.

This will then be followed by an in-depth interview with Kay Burley.

The programme will be broadcast live for 90 minutes and for free on Sky News channel 501, on Freeview 233, on Sky Showcase channel 106, and across Sky News’ digital channels.