With membership soaring, the Green party is grappling with logistics, culture shifts and a flood of new activists

It is, as one Green activist put it, a never-ending series of “constantly good problems to have”. But how does a party adapt to the sudden trebling of its membership? And when a majority of people in an organisation are new, is it even the same thing anymore?

The basic facts alone are startling. Before Zack Polanski took over as leader last September, the Greens in England and Wales had around 66,000 members. They are now at 215,000, and still rising at speed.

Current and ex-staff claim demise of London restaurant can be traced back to the departure of chef’s right-hand man

Dinner by Heston was once one of the world’s most revered restaurants, known for its decadent and unusual dishes such as the “meat fruit”.

But Heston Blumenthal announced this week that he is winding down operations at the two Michelin-star restaurant at the Mandarin Oriental hotel in Knightsbridge, London, saying it was because the tenancy had “finished”.

For these art forms to thrive, they need to attract young people. The Oscar contender’s comments are just the conversation starter they need

• Rebecca Humphries is an actor and author

Timothée Chalamet thinks no one cares about opera or ballet. He told Matthew McConaughey so. Also, the entire world.

“I don’t want to be working in ballet, or opera, or things where it’s like, ‘Hey, keep this thing alive, even though like no one cares about this any more’,” Chalamet said in a recorded conversation for Variety.

Rebecca Humphries is an actor and author

Ukrainian photographer Arthur Bondar has amassed a huge collection of pictures from often unknown photographers

After pulling on white cotton gloves, Arthur Bondar carefully takes a handful of 4cm by 9cm negatives from an old cigarette box and holds them up to the light of his study window. Inverted images of a woman on a horse, a group of women tending cabbages in a field, laughing figures at the seaside, a woman posing as a military ship sails by, hover in front of him, almost ghostlike. Although they are tiny, he is able to make out key details such as the insignia on a uniform, or the name of a ship, that trigger his curiosity and give him a starting point for his research.

Arthur Bondar examines some of his negatives. Photograph: Oksana Yushko/The Guardian

Datacentre investment boom is one of the biggest infrastructure gambles of this era, and Britain may be uniquely exposed

Stargate was to be the world’s biggest AI investment: a $500bn infrastructure project to “secure American leadership in AI”. Never shy of hyperbole, its key backer, the ChatGPT-maker OpenAI, promised “massive economic benefit for the entire world” with facilities to help people “use AI to elevate humanity”.

Now, OpenAI appears to be dropping out of a part of the deal – the expansion of a flagship datacentre stretching across a swathe of land in Abilene, Texas, which has become one of the most visible manifestations of a frenzy of investment in the chips and power plants required to build and run AI. There has been a breakdown in negotiations over project financing, as well as the timeline of when the expanded capacity might come online.

After my parents split up, my older sister and I lived with our dad while the youngest stayed with our mum. It became an experiment in nature v nurture – and had a profound effect on our relationships

There is a paradox at the heart of sibling relationships and it is this: that children raised in the same family are for ever bound by shared experiences, yet have different childhoods. The paradox is partly (and most commonly) explained by the topic of birth order theory – the idea that your position in the family shapes your personality and potential. Oldest children, for example, are born into an adult world, full of grown-up language and behaviour. Governed by anxious, inexperienced but still fresh parents, they bask in the glow of undivided attention. Their infancy will be markedly different to that of their little brother or sister who will be born into a family. These second-born children have a toddler as their role model/ally/nemesis, no new clothes, and they also have to share their parents’ attention. These parents are a little less fresh and little more savvy. By the time any subsequent children come along, parents are at their most relaxed and most exhausted. Youngest children get away with a lot (spoken as a true middle sibling).

But neat as birth order theory may be, our place in the family roll call cannot fully account for the ways in which we grow up “together apart” as siblings. To do that, we must examine – and in some cases untangle – all of the knottiness underpinning our accepted roles as “responsible firstborns”, “problematic middles” or “spoilt babies”. We need to look at the home environment, the state of the parents’ relationship, their careers, the pressures placed on each child on account of gender or aptitude, the expectations in families where a child has additional needs – or indeed, in the worst-case scenario, where a child may not have survived – before we can begin to comprehend our brother’s or sister’s version of events. Difficulties typically arise because of the slipperiness of memory, often shot through with profound emotions – making it hard to pull together a coherent and agreed-upon story of our pasts.

Warning for US citizens follows missile attack on US embassy, as Trump says US will coordinate with nations to protect oil tankers

• How have you been affected by the latest Middle East events?

Iranian media has reported there is no damage to its oil infrastructure on Kharg Island, following US attacks that Trump claimed had “obliterated” military targets on the Island.

Iran’s armed forces have threatened to destroy US-linked oil infrastructure if its own energy facilities are hit. Kharg Island serves as the export terminal for 90% of Iran’s oil shipments.

The facility was attacked on Friday night, bringing the toll of medical staff to 31 killed in past 12 days

Israel killed 12 medical workers in a strike on a medical centre in south Lebanon on Friday night, bringing the toll of healthcare staff killed in the country by Israel to 31 over the past 12 days.

A primary healthcare facility in the town of Burj Qalaouiyah was hit by an Israeli strike late on Friday, setting it ablaze and causing the structure to collapse on top of the staff inside. The strike killed doctors, paramedics and nurses on duty, according to the Lebanese ministry of health, which said it “violated all international humanitarian laws” in a statement.

Closure of strait of Hormuz puts pressure on region’s economies amid growing resentment about conflict started by US and Israel

• Middle East crisis – live updates

An eerie quiet hangs over Ras Al Khaimah’s industrial port. Usually a thriving maritime hub of the United Arab Emirates, now ships stand docked and silent. Not far out along the hazy horizon, a backlog of hundreds of tankers have lined up in recent days, halted along a waterway flooded with danger.

Any vessel heading past Ras Al Khaimah out to the Arabian Sea must traverse the world’s most treacherous strip of water for shipping today: the strait of Hormuz. Just over 20 nautical miles from Ras Al Khaimah, two oil tankers heading for the strait were attacked by Iranian missiles this week, one catching fire.

Almost 20% of the shelters are unsuitable or don’t exist at all, with officials admitting Iran war ‘has exposed just how ill-prepared we are’

At 12.33pm on 2 March, Valentinos Pangalos was ordered to activate sirens at Paphos international airport in Cyprus. An emergency had been declared. A suspicious object – thought to be a drone packed with explosives – had been detected heading towards the facility. Barely 12 hours earlier, an Iranian-made, Shahed-type drone had smashed into a hangar at RAF Akrotiri, raising the alarm further. The airport needed to be evacuated immediately.

“In 24 years of doing this job I’d never been asked to do anything like it,” said Pangalos, among the longest-serving officers at the island’s civil defence force. “To receive such an order, so abruptly, was intense.”