In today’s newsletter: ​The outbreak aboard a luxury cruise ship​ offers a stark reminder of how easily a deadly pathogen can hitch a ride across borders​, and how fragile global preparedness remains

Good morning. This is Michael Segalov – as of today, I’ll be popping up into your inboxes from time to time.

There’ll be no shortage of infighting, intrigue and briefing in Westminster this week, as the dust settles on the government’s disastrous election results. We’ll be bringing you the latest on backbench MP Catherine West’s (likely futile) attempt to topple Keir Starmer, alongside the rest of the fallout.

UK politics | Keir Starmer faces a fight for his political life in the next 24 hours as potential Labour leadership rivals from Wes Streeting to Angela Rayner position themselves for a contest.

Iran conflict | Donald Trump has rejected an Iranian response to a US peace proposal as “totally unacceptable”, on a day the ceasefire showed signs of fraying as drone strikes were reported around the region and Benjamin Netanyahu warned the war was “not over”.

UK news | Labour has accused Nigel Farage of attempting to dodge scrutiny as the Reform leader continued to face questions over the £5m gift he received from a crypto billionaire shortly before the last general election.

Business | The full nationalisation of British Steel is expected to be announced in the king’s speech this week, a year after the government took over the daily running of the loss-making business from its Chinese owner.

Health news | Experts have called for a four-day week in the UK as research suggests those who work longer hours are more likely to be obese.