AN emotional Malcolm Turnbull has confessed he almost "burst into tears" when reflecting on the terror attack that killed eight people - including two Australians - and wounded almost 50 at Borough Markets.
Mr Turnbull took a tour through the terror site with British Prime Minister Theresa May after he was welcomed to Downing Street. Borough Markets has only recently reopened after the June 3 incident, where knife-wielding assailants executed a frenzied attack on people at bars and restaurants.
The PM became emotional as he spoke about meeting police officers who had attempted to save Australian victim Sara Zelenak, saying he had found it hard not to "burst into tears" as they recounted what happened.
"The three of us did our best not to burst into tears," he said.
"They were very brave men, very brave men and women and I just want to thank them on behalf of all Australians.
"It was a very moving visit...and I want to say how much we admire the outstanding response of your police arriving on the scene so quickly, dealing with the terrorists so effectively and decisively," Mr Turnbull said.
"They ran towards the danger while others were fleeing it."
Speaking in the White Room at Number 10 before a formal closed-door meeting, Ms May spoke of the strong links between Britain and Australia as they pledged to work more closely together on national security matters.
The two prime ministers also spoke about the resilience of the community in the face of the terror threat, and said Britain and Australia would continue to fight terrorism at home and in the Middle East.
"We say to these killers to these terrorists that seek to change the way we live, we will not be cowed, we won't change the way we live, we won't stop going out at night, we won't stop enjoying ourselves. We will defy you and defeat you," Mr Turnbull said.
"We will continue to defeat them, in the field, at home, around the world, whether here in London, in Sydney and Melbourne in Manchester and in cyberspace as well."
Ms May spoke about Australian nurse Kirsty Boden who also lost her life in the Borough Market attack, praising her for having "rushed to the scene".
"They didn't think of themselves but went to help those who they saw in need."
She said that the UK was going "to stand up against these terrorists".
"They will not destroy our way of life, and our values will prevail."
Mr Turnbull responded: "they will, because they are right."
Mr Turnbull asked one man about his experience, and he said he was on his way in when his wife called and said she was stuck inside the shop, after pulling the shutter down.
"They barricaded themselves didn't they? They protected your customers... and others that came in. That's great," Mr Turnbull said.
"You've shown great resilience. Amazing policing; that response, just extraordinary."
Mr Turnbull and Ms May stood just near where the terrorists were shot dead, as stallholders described how terrified people reacted. "You've shown great resilience," Mr Turnbull said.
TURNBULL BRIEFED BY SCOTLAND YARD
Earlier, the Prime Minister received an intelligence and security briefing from top British officials ahead of a meeting with UK leader Theresa May. Mr Turnbull met in London with Metropolitan Police commissioner Cressida Dick - Scotland Yard's first female boss.
Commissioner Dick took on the role on April 10, with her first official engagement being the funeral of PC Keith Palmer, the officer killed in the Westminster attack.
The current UK threat level for international terrorism is "severe", meaning an attack is highly likely.
Mr Turnbull was later due to pay his respects to the victims of last month's London Bridge terrorist attack - two of whom were Australians - and meet British first responders to convey Australia's gratitude for their bravery and assistance.
As well as dealing with a heightened terrorism alert level, the Met has 250 specialists investigating the fire at Grenfell Tower on June 14.
A total of 21 people who died have been formally identified by the coroner and their families informed but there are fears for many others. Terrorism and trade will be on the agenda when Mr Turnbull holds talks in Downing Street.