Allies from the G7 group of leading powers will on Monday seek common ground with President Donald Trump at a summit in France, which gets underway hours after the US and Iran agreed a deal to end the Middle East war. With Trump arriving in the Lake Geneva resort of Evian-les-Bains flush from celebrating his 80th birthday the day earlier, allies will want details on the deal and the planned reopening of the Strait of Hormuz to shipping.