Sir Keir Starmer appeared to have had 'any traces of hubris surgically removed from his body language' as he gave his first speech in Downing Street, an expert has said.
The new Prime Minister only seemed to smile before and after his speech as he promised to rebuild trust and restore hope following a landslide Labour victory.
Sir Keir said the British had voted 'decisively for change' and the UK could 'move forward together' as Labour took office following 14 years of Conservative rule.
Analysing his speech, body language expert Judi James told MailOnline that there were 'handshakes, hugs and kisses' on his approach to the Downing Street lectern.
But she said he then 'seemed to deliberately avoid signals of the kind of gushing, celebrity-style euphoria and excitement that Blair's 1997 victory was famous for'.
Prime Minister Sir Keir Starmer speaks outside 10 Downing Street for the first time today
A smiling Prime Minister Keir Starmer and his wife Victoria arrive at Downing Street today
Labour leader and incoming Prime Minister Sir Keir Starmer speaks to the media at No.10 today
Ms James continued: 'Political hubris displays have brought the Labour Party to its knees before, notably with Neil Kinnock, and Starmer looked like a man who'd therefore had any potential traces of hubris surgically removed from his body language.
Body language expert Judi James has given her analysis of Sir Keir Starmer's speech
'Starmer's walk towards the crowd looked steady and slow and it came with no moment of raging, bounding triumph, just a responsible-looking handing of his folder of notes to his PA.'
She said that his smile 'displayed calm, grown-up pleasure and even the handshakes and hugs looked tempered rather than overkill gleeful'.
Ms James added that this suggesting that if 'Starmer had let rip running about with his jumper over his head at the overnight results it was strictly off-camera, in the privacy of his own office'.
She also told how this beaming smile 'vanished as he began his speech, which was performed in the style of a captain of a cruise ship about to navigate through very choppy waters'.
Ms James said his only sign of 'inner glee' came as he approached the lectern, pointing out how he paused to straighten his glasses and licked at his lips, with his tongue 'working its way round the inside of his mouth' before he began to speak.
Judi James made comparisons to Tony Blair in May 1997 when he became prime minister and was greeted by hundreds of Union Jack-waving supporters as he arrived at Downing Street
Tony Blair addresses the nation for the first time as Prime Minister in Downing Street in 1997, after Labour ousted the Tories from 18 years of government with a landslide election victory
She continued: 'This is a relishing gesture, mimicking someone sitting down to enjoy a good meal.
'It hinted that, despite the serious tone, he really is looking forward the task of running the country that he described as wounded while performing a facial wince of pain.'
Sir Keir spoke after a brutal set of results for the Conservatives, which saw Rishi Sunak announced he would quit as Tory leader as he used his final speech in Downing Street to apologise to the British people and the Conservative Party.
After 648 of the 650 Commons seats had been declared, Labour had a majority of 176. Labour had 412 seats and the Tories 121, the worst result in the party's history.
Sir Keir told the gathered crowd: 'Now our country has voted decisively for change, for national renewal and a return of politics to public service.
Prime Minister Keir Starmer speaks at No. 10 Downing Street today after the General Election
Sir Keir Starmer speaks to the nation as he enters Downing Street following Labour's win today
Prime Minister Sir Keir Starmer walks back after speaking outside 10 Downing Street today
Sir Keir Starmer makes a speech at Downing Street after becoming the new Prime Minister
'When the gap between the sacrifices made by people and the service they receive from politicians grows this big, it leads to a weariness in the heart of a nation, a draining away of the hope, the spirit, the belief in a better future.
'But we need to move forward together. Now this wound, this lack of trust can only be healed by actions not words, I know that.
'But we can make a start today with the simple acknowledgement that public service is a privilege and that your government should treat every single person in this country with respect.'
He said 'my Government will serve you, politics can be a force for good', adding: 'The work of change begins immediately, but have no doubt, we will rebuild Britain.'
Low turnout underlined Sir Keir's message about the need to rebuild trust in the political system after 14 years of Tory rule marred by the Partygate scandal and the chaos of Conservative infighting which saw David Cameron followed in quick succession by Theresa May, Boris Johnson, Liz Truss and, finally, Mr Sunak.
After 648 of 650 results had been declared, the turnout figure stood at 59.85 per cent, the lowest turnout at a general election since 2001.
Sir Keir said: 'Changing a country is not like flicking a switch. The world is now a more volatile place. This will take a while.
'But have no doubt that the work of change begins immediately. Have no doubt that we will rebuild Britain, with wealth created in every community.
'Our NHS back on its feet facing the future. Secure borders, safer streets, everyone treated with dignity and respect at work. The opportunity of clean British power, cutting your energy bills for good.
'Brick by brick, we will rebuild the infrastructure of opportunity.'
