Bulletin PM briefing: Extreme heat warning and will Starmer resign?Here are five of today’s top storiesWill Starmer resign? Labour ministers up pressure after Burnham wins by-election.How ‘heroic’ zookeeper jumped into crocodile enclosure to rescue boy.US talks with Iran suddenly called off as Israel and Hezbollah trade attacks.Italy’s deputy PM cancels US trip over ‘serious and offensive’ Trump comments about Meloni.Met Office issues amber extreme heat weather warning as temperatures set to reach mid-30s.Get in, get informed, get on with your day. Sign up for the Bulletin newsletter for a quick, verified round-up of the news that matters most.