In today’s newsletter: An argument about money has also spotlighted questions about Britain’s place in the world and the changing face of warfare

Good morning. What conflict has raged longer than the hundred years war? The fight between the Ministry of Defence and the Treasury over defence spending.

I’d love to claim this as my own, but avoid patter theft this early in the day. So I’ll credit my colleague Dan Sabbagh, the Guardian’s defence and security editor, who spoke to me ahead of this week’s G7 meeting, in France, where Keir Starmer arrived yesterday for what could be his final international summit. The prime minister can anticipate candid discussions about international partnerships in conflicts in Ukraine and the Middle East, both of which may soon demand increased involvement from the British military.

Middle East | Donald Trump has declared that the strait of Hormuz will be “completely open” from Friday, as western leaders gathering at the G7 summit in Évian-les-Bains battled to prevent the fragile US deal with Iran from almost immediately unravelling.

UK politics | Political hatred and division in the UK is probably worse now than during the Brexit referendum, when Jo Cox was murdered, says Kim Leadbeater, Cox’s sister who is now also a Labour MP.

Crime | A schoolteacher described as a “serial manipulator and a serial liar” has been found guilty of sexually abusing and murdering a baby he and his partner had adopted.

Environment | Half of the world’s children are exposed to at least three overlapping climate hazards threatening their health, education and survival, according to a Unicef report.

US news | Eight people are presumed dead after a B-52 bomber crashed shortly after takeoff on Monday morning at a US air force base in California’s Mojave Desert, officials said.