In today’s newsletter: Health bosses raise alarm as junior doctors begin the longest strike in NHS history. But how will the action actually impact patients?

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Good morning. It is never a good time to be seriously ill, but this week is worse than most. The NHS is in the grip of its customary winter crisis, which typically peaks in early January. More than 125,000 posts are vacant, and about 6.5m people are on waiting lists for routine appointments, more than a million of them for more than one procedure.

Today, junior doctors in England go out on strike again, for six days. (A pay deal has already been reached in Scotland, while doctors in Wales are due to strike later this month and those in Northern Ireland are currently being balloted.) Almost a year after the first strike over pay and conditions, the dispute still appears a distance from being resolved.

Israel-Gaza war | One of Hamas’s most senior officials, Saleh al-Arouri, was killed in an Israeli drone strike in Beirut that threatened a significant and dangerous escalation of Israel’s war against Hamas and its related conflict with the Lebanese militant group Hezbollah. Read Jason Burke’s analysis.

Japan | A passenger jet that collided with a coast guard plane in a catastrophic accident at Tokyo’s Haneda Airport had been given permission to land, Japan Airlines executives have said. Five crew members on the coast guard plane were killed while all 379 passengers evacuated from the burning Japan Airlines jet.

UK news | Camila Batmanghelidjh, who created the Kids Company children’s charity and became one of the UK’s best known and most powerful campaigners for disadvantaged youngs people, has died aged 61.

Climate Crisis | The UK had its second hottest year on record in 2023, according to provisional data from the Met Office, as the climate crisis continued to deliver elevated temperatures. Such a warm year would have occurred only once in 500 years without human-caused global heating, the scientists said.

US news | The president of Harvard University has resigned amid pressure over her response to questions about antisemitism at US colleges and allegations that she has plagiarized some of her academic work. Claudine Gay’s six-month tenure is the shortest in the university’s history.

Six days of strike action following bank holidays at a time of enormous pressure, there are real issues around patient safety”

NHS Confederation chief executive, Matthew Taylor, 23 December

Junior doctors’ pay has been cut by more than a quarter since 2008”

BMA website