The prime minister will also hold face-to-face meetings with Japanese leader Shinzo Abe, Egypt's Abdel Fattah el-Sisi and outgoing Italian premier Giuseppe Conte.

Mr Morrison told reporters at the summit in Biarritz he was braced for the Mr Johnson to raise the Ben Stokes-inspired England victory in the Ashes test to level the series 1-1.

"I'm sure he'll give me a hard time about the fact they clipped us in the latest Ashes," Mr Morrison said.

In a sign of how cricket diplomacy is playing a part at the gathering of world leaders, Downing Street insiders said Mr Johnson found out about Sunday's Headingley test win from Indian leader Narendra Modi.

In the main business on the agenda at the gathering of the world's richest democracies, the leaders will consider how to protect the environment, with Mr Johnson pledging STG10 million to help prevent the destruction of the Amazon.

He also called on world leaders to step up efforts to save endangered species.

The funding for the South American rainforest will be made available immediately to protect and restore the habitat, including in areas affected by the current fires.

But environmental campaigners questioned Mr Johnson's commitment to the agenda following reports his Government is set to cut fuel duty.

Aaron Kiely, climate campaigner at Friends of the Earth, said: "It doesn't add up for the government to commit to global biodiversity and pay the usual lip-service to the climate emergency while cutting fuel duty at home."

Australian Associated Press