DOWNING STREET has been accused of meddling with the report on the partygate scandal, as a new poll showing Tory “seats disappearing” sparked more back-bench discontent.

The Prime Minister’s office is reported to have lobbied for changes to the report by top civil servant Sue Gray on the lockdown-breaking parties at No 10 and across Whitehall.

Northern Ireland Secretary Brandon Lewis told Sky News’ Sophy Ridge on Sunday programme he was “absolutely confident” that no-one in Downing Street put pressure on Ms Gray to revise the document.

However, there have been reports that she was lobbied not to publish the names of some of those who attended the 12 illegal gatherings.

Details of the “Abba night” party, allegedly held in Boris Johnson’s flat on November 13 2020, are also said to have been “tweaked” by Mr Johnson's chief-of-staff Steve Barclay.

Labour deputy leader Angela Rayner said: “The PM must explain why changes to her report were made after he and several of his senior staff interfered in an investigation he claimed was independent. “

However, Downing Street denied that there hads been any tampering.

A Cabinet Office spokesperson said: “We did not change the report in terms of substantive content.”

Meanwhile, former Brexit secretary David Davis warned of growing Tory back-bench discontent with the Prime Minister after an opinion poll by YouGov suggested that his party would lose all but three of 88 “battleground” constituencies if a general election was held now.

In this scenario, Mr Johnson’s own Uxbridge and South Ruislip seat would “likely fall” to Labour, with only Ashfield, Bassetlaw and Dudley North remaining blue.

Mr Davis, who implored Mr Johnson in January to “in the name of God, go”,  told BBC Radio 4’s Today programme that many Tory MPs now “see their own seats disappearing in many cases. They see themselves losing the next election on the back of this.”

Two more Conservative MPs have revealed that they have submitted letters of no confidence in the PM, former health minister Steve Brine and Newton Abbot MP Anne Marie Morris.

Sir Graham Brady, chairman of the 1922 Committee of backbench Tories, must arrange a confidence vote if he receives at least 54 letters demanding one.

More than 20 Tory MPs have publicly stated that they no longer support Mr Johnson, but more may have also sent letters as part of the highly secretive process.