After a week in the US, where Anthony Albanese locked in a formal meeting with the unpredictable right-wing president, the prime minister now finds himself in more welcoming company.
The centrepiece of day one of his UK trip is formal talks at 10 Downing Street on Friday, local time, with his British counterpart Keir Starmer.
On this side, Mr Albanese will enjoy the embrace of fellow travellers from the political left, with a spate of like-minded leaders also in town.
So too is Spanish Prime Minister Pedro Sanchez, one of the harshest critics of Israel's actions in Gaza, and Canadian Prime Minister Mark Carney, who surged to office on a campaign of Trump-bashing.
They are all attending the Global Progress Action Summit, which brings together leaders, policy experts and strategists from more than 20 countries.
Mr Albanese might draw ideas, or conservative-beating strategies from his discussions - but he also arrives in the UK with plenty of harsh realities to deal with: Ukraine, Gaza and AUKUS among them.
The UK is one of Ukraine's strongest supporters, with Mr Starmer rallying Western nations to commit forces and funding towards a "coalition of the willing" to keep the peace following a ceasefire with Russia.
Former UK prime minister Tony Blair, ex-New Zealand prime minister Jacinda Ardern and rising US Democratic stars such as Pete Buttigieg are in London for the global gathering of progressive leaders.
Australia and its former colonial power also co-ordinated their formal recognition of Palestine, doing so at the United Nations.
Mr Albanese's first formal meeting of his UK tour was with Mr Blair, who has put forward a plan to temporarily head up a governing body for Gaza once Israel's war in the enclave ends.
Mr Albanese also held a bilateral with Mr Sanchez, and Mr Carney, as well as one figure from the right: UK opposition leader Kemi Badenoch.
The AUKUS nuclear submarine deal between Australia, the US and UK is also likely to be discussed, as the White House continues its review of the trilateral defence pact.
Questions remain over the supply of the submarines, given both the US and UK are facing significant backlogs in their shipyards.
Monash-Warwick Alliance International relations researcher Tom Howe said Australia had a lot riding on London's ability to deliver on its promises.
"The UK is supposed to be deploying and rotating a submarine out of the base in Perth from 2027," he told AAP.
Mr Albanese will be able to pick up the issue with Mr Trump on October 20, when he will embark on a state visit to the White House.
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