The Labour leader is said to be sacking those failing to break through with voters. Shadow Home Secretary Nick Thomas-Symonds, along with shadow education and culture secretaries Kate Green and Jo Stevens are said to be in the firing line.

       The clear-out is taking place simultaneously to a press conference by Ms Rayner on accusations of sleaze in the Conservative Party.

       She appeared caught off-guard by the reshuffle, unaware it was taking place.

       Labour has seen a bounce in the polls in recent weeks following a series of blunders, U-turns and broken promises by the Government.

       Sir Keir is eager to build on that momentum by placing more political heavyweights on the frontbench to deliver some knockout blows to Conservative ministers.

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       The source added: "The sleaze and standards row has been a good thing for us."

       Another said: "Keir is genuinely angry about it and does want the House and politics to be better.

       "That has made a difference — it’s a very authentic response. He’s got his mojo back.

       "The last month or so has given him and the rest of the shadow cabinet more confidence."

       Successive polls have shown the gap narrowing between Labour and the Tories, with the Opposition even taking the lead in some surveys.

       However, Mr Thomas-Symonds has failed to gain much traction in his role as shadow home secretary.

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       A YouGov poll in September suggested just six percent of people had heard of him - joint-worst along with shadow communities secretary Steve Reed.

       He's been accused of failing to effectively combat Priti Patel despite the Home Secretary coming under increasing pressure in recent weeks over the crisis in Channel crossings.

       One MP said: "Nick is a lovely guy but I don’t think he’s making very much weather with major failings by the Home Office."

       Sir Keir last reshuffled his shadow cabinet in May after Labour's poor results in the local elections and the party's loss in the Hartlepool by-election.

       The restructure turned into a farce when he attempted to sack his deputy, Angela Rayner, from her role as party chair.

       Ms Rayner, blamed by Sir Keir for the party's poor results, emerged with a new beefed-up role.

       Her eventual promotion came after Labour MPs lined up to criticise the attempts to sack her.

       It is thought Ms Rayner will be consulted before any changes to the top team in the next reshuffle.