Labour big beasts are urging Keir Starmer to quell infighting and get his government back on track today after Sue Gray’s extraordinary exit.The PM has been forced to conduct his first ‘reset’ after barely three months in power, replacing his chief of staff and drafting in a new comms team.  Morgan McSweeney is now in the top job at No10, sealing his victory in an apparent power struggle with former civil servant Ms Gray.But even allies are acknowledging that Sir Keir must do better after a post-election ‘honeymoon’ cut short by the winter fuel allowance furore, freebies scandal and a Downing Street civil war. The looming Budget is set to be a critical moment as the Chancellor looks for ways of hiking taxes.  Former minister Baroness Harman said Sir Keir would be ‘frustrated’ after ‘missteps’ and ‘clunkiness’ blighted his transition to power.Ex-No10 spin chief Alastair Campbell said the premier must recognise that government is ‘harder than Opposition’ and ‘narrate a very clear strategy’.  Touring broadcast studios this morning ahead of Parliament returning from the conference recess, Defence Secretary John Healey paid tribute to Ms Gray’s contribution.However, he said he ‘really respects her decision to step aside’ as it ‘allows us more clearly’ to set out a mission for Government.  Sir Keir Starmer has replaced Sue Gray with his campaign supremo Morgan McSweeney as his Chief of Staff  Following her resignation, Ms Gray now becomes the Prime Minister’s ‘envoy for the regions and nations’, and is expected to take a pay cut from her former salary of £170,000 Sir Keir’s new Chief of Staff Mr McSweeney is credited with transforming the Labour Party into an election-winning machine after the Corbyn eraMr McSweeney has already been credited with transforming the Labour Party into an election-winning machine after the Corbyn era.Having been director of centrist think-tank Labour Together, he ran Sir Keir’s successful leadership campaign in 2020 before becoming director of campaigns as he plotted the party’s rise to power this year.He was initially appointed head of ­political strategy in Downing Street in July but soon clashed with Ms Gray, who was meant to have been delivering the programme for government.There were numerous briefings that he was at the head of a ‘boys’ club’ inside No 10, along with Cabinet Office minister Pat McFadden, with Ms Gray on the other side. Amid jostling for position between the sides, it was even reported that she had moved Mr McSweeney’s desk further away from the PM’s office.Then Ms Gray hit the headlines after it emerged that she was being paid more than Sir Keir and stayed away from Labour conference, although she joined him on important trips to see Joe Biden in ­Washington DC and Donald Trump in New York.And last night one senior figure told the Mail, as the Partygate inquisitor was ousted: ‘The lads have clearly won this round.’Former Shadow Chancellor John McDonnell also accused ‘the boys’ in No 10 of caring more about ­getting rid of Ms Gray than dealing with more ­important matters facing the world.He wrote online: ‘We’re facing the ­potential of a war setting the Middle East alight, already ­thousands are being killed in Lebanon, and what is the focus of the boys around Keir Starmer’s office, carving up Sue Gray and grabbing her job and salary. Words fail me.’Mr McSweeney, whose wife Imogen Walker is a newly elected Labour MP in Scotland, has been given two female assistants.Vidhya Alakeson and Jill ­Cuthbertson were both ­promoted from roles in No 10 to become deputy chiefs of staff. Touring broadcast studios this morning ahead of Parliament returning from the conference recess, Defence Secretary John Healey paid tribute to Ms Gray’s contributionAnother senior woman in Downing Street, director of the policy unit, Nin Pandit, was also given a powerful new civil service role, that of principal private ­secretary to the PM.It had been thought that the recruitment process had been held up by tussles between Ms Gray and others in No 10 over who should get the job, as she reportedly favoured a former colleague.Ms Pandit worked for many years in the NHS and will be joined in Downing Street by a ­former director of communications of NHS England.James Lyons will lead a new ‘strategic communications team’ following concern that No 10 had been too slow to react to ­damaging stories including the rows over freebies and influential donor Lord Alli, as well as the briefings against Ms Gray.Sir Keir said: ‘I’m really pleased to be able to bring in such ­talented and experienced ­individuals into my team. This shows my absolute determination to deliver the change the country voted for.’Ms Gray now becomes the Prime Minister’s ‘envoy for the regions and nations’, and is expected to take a pay cut from her former salary of £170,000. She said in a statement: ‘It has been an honour to take on the role of chief of staff, and to play my part in the delivery of a Labour government.’Throughout my career my first interest has always been public service. However, in recent weeks it has become clear to me that intense commentary around my position risked becoming a ­distraction to the Government’s vital work of change.’It is for that reason I have ­chosen to stand aside, and I look forward to continuing to support the Prime Minister in my new role.’Tory MP Saqib Bhatti said: ‘Morgan McSweeney wins the battle against Sue Gray. It was clear he and his allies have been briefing against her since day one.’It’s unlikely to be the end of the matter and does not bode well for stability at the top of government.’