The UK is on track to break the record for this year’s hottest day for two days running with temperatures forecast to soar up to 33C on Friday.

Hot and dry conditions are expected to continue with the weather on track to reach the low 30s in many areas, but it could surpass Thursday’s record of 32.2C, the Met Office said.

Health alerts have already been issued across England by the UK Health Security Agency (UKHSA) and will remain in place until 09:00 on Monday as it warns of health risks to the wider population.

The heatwave could peak on Saturday at a possible high of 34C, with thundery showers forecast for North Wales and northwest England, and dry and hot conditions in the east.

According to the Met Office, by Friday afternoon many regions are also expected to pass the heatwave criteria – which means a temperature threshold is sustained for three consecutive days.

A heatwave could be declared in London on Friday where it has passed the threshold of 28C for two days in a row.

On Thursday, Suffolk became the first place in the UK to officially enter a heatwave after temperatures passed 27C for the third day in a row.

Some relief is forecast for Sunday, where the south and east will dip to the high 20s, while temperatures will cool to the mid 20s elsewhere.

Despite the record-breaking heat so far this year, temperatures are still below the June peak of 35.6C in 1976.

The heat that continues to build is due to an area of high pressure across the UK which draws in hot weather from other parts of Western Europe with windy conditions.

The UKHSA warned of “significant impacts” across health and social care services and a potential rise in deaths particularly among people with health conditions and those aged over 65.

Firefighters have also responded to more than 500 wildfires across England and Wales this year – a 717% surge on the same period in 2024, the National Fire Chiefs Council said.

They are urging the public to exercise caution when spending time outdoors in order to prevent further spikes.

Whether you reckon they are cute, ugly or just plain weird, chances are you have heard of the furry dolls that have become a global sensation – Labubu.

Born a monster, the elf-like creature from Chinese toy maker Pop Mart is now a viral purchase. And it has no dearth of celebrity advocates: Rihanna, Dua Lipa, Kim Kardashian and Blackpink’s Lisa. Ordinary folk are just as obsessed – from Shanghai to London, the long queues to snap up the doll have made headlines, sometimes descending into fights even.

“You get such a sense of achievement when you are able to get it among such fierce competition,” says avowed fan Fiona Zhang.

The world’s fascination with Labubu has almost tripled Pop Mart’s profits in the past year – and, according to some, even energised Chinese soft power, which has been bruised by the pandemic and a strained relationship with the West.

So, how did we get here?

It’s a question that still bothers many – and even those who know the answer are not entirely sure they can explain the craze.

Labubu is both a fictional character and a brand. The word itself doesn’t mean anything. It’s the name of a character in “The Monsters” toy series created by Hong Kong-born artist Kasing Lung.

The vinyl faces are attached to plush bodies, and come with a signature look – pointy ears, big eyes and a mischievous grin showing exactly nine teeth. A curious yet divided internet can’t seem to decide if they are adorable or bizarre.

According to its retailer’s official website, Labubu is “kind-hearted and always wants to help, but often accidentally achieves the opposite”.

The Labubu dolls have appeared in several series of “The Monsters”, such as “Big into Energy”, “Have a Seat”, “Exciting Macaron” and “Fall in Wild”.

The Labubu brand also has other characters from its universe, which have inspired their own popular dolls – such as the tribe’s leader Zimomo, her boyfriend Tycoco and her friend Mokoko.

To the untrained eye, some of these dolls are hard to distinguish from one another. The connoisseurs would know but Labubu’s fame has certainly rubbed off, with other specimens in the family also flying off the shelves.

A major part of Pop Mart’s sales were so-called blind boxes – where customers only found out what they had bought when they opened the package – for some years when they tied up with Kasing Lung for the rights to Labubu.

That was 2019, nearly a decade after entrepreneur Wang Ning opened Pop Mart as a variety store, similar to a pound shop, in Beijing. When the blind boxes became a success, Pop Mart launched the first series in 2016, selling Molly dolls – child-like figurines created by Hong Kong artist Kenny Wong.

But it was the Labubu sales that fuelled Pop Mart’s growth and in December 2020, it began selling shares on the Hong Kong Stock Exchange. Those shares have soared by more than 500% in the last year.

Pop Mart itself has now become a major retailer. It operates more than 2,000 vending machines, or “roboshops”, around the world. And you can now buy Labubu dolls in stores, physical or virtual, in more than 30 countries, from the US and UK to Australia and Singapore, although many of them have recently paused sales due to overwhelming demand. Sales from outside mainland China contributed to nearly 40% of its total revenue in 2024.

In a sign of just how popular Labubus have become, Chinese customs officials said this week that they had seized more than 70,000 fake dolls in recent days.

The demand did not rise overnight though. It actually took a few years for the elfin monsters to break into the mainstream.

Before the world discovered Labubu, their fame was limited to China. They started to become a hit just as the country emerged from the pandemic in late 2022, according to Ashley Dudarenok, founder of China-focused research firm ChoZan.

“Post-pandemic, a lot of people in China felt that they wanted to emotionally escape… and Labubu was a very charming but chaotic character,” she says. “It embodied that anti-perfectionism.”

The Chinese internet, which is huge and competitive, produces plenty of viral trends that don’t go global. But this one did and its popularity quickly spread to neighbouring South East Asia.

Fiona, who lives in Canada, says she first heard about Labubu from Filipino friends in 2023. That’s when she started buying them – she says she finds them cute, but their increasing popularity is a major draw: “The more popular it gets the more I want it.

“My husband doesn’t understand why me, someone in their 30s, would be so fixated on something like this, like caring about which colour to get.”

It helps that it’s also affordable, she adds. Although surging demand has pushed up prices on the second-hand market, Fiona says the original price, which ranged from 25 Canadian dollars ($18; £14) to 70 Canadian dollars for most Labubu dolls, was “acceptable” to most people she knows.

“That’s pretty much how much a bag accessory would cost anyway these days, most people would be able to afford it,” she says.

Labubu’s popularity soared in April 2024, when Thai-born K-pop superstar Lisa began posting photos on Instagram with various Labubu dolls. And then, other global celebrities turned the dolls into an international phenomenon this year.

Singer Rihanna was photographed with a Labubu toy clipped to her Louis Vuitton bag in February. Influencer Kim Kardashian shared her collection of 10 Labubu dolls with her Instagram following in April. And in May, former England football captain Sir David Beckham also took to Instagram with a photo of a Labubu, given to him by his daughter.

Now the dolls feel ubiquitous, regularly spotted not just online but also on friends, colleagues or passers-by.

Put simply, we don’t know. Like most viral trends, Labubu’s appeal is hard to explain – the result of timing, taste and the randomness that is the internet.

Beijing is certainly happy with the outcome. State news agency Xinhua says Labubu “shows the appeal of Chinese creativity, quality and culture in a language the world can understand”, while giving everyone the chance to see “cool China”.

Xinhua has other examples that show “Chinese cultural IP is going global”: the video game Black Myth: Wukong and the hit animated film Nezha.

Some analysts seem surprised that Chinese companies – from EV makers and AI developers to retailers – are so successful despite Western unease over Beijing’s ambitions.

“BYD, DeepSeek, all of these companies have one very interesting thing in common, including Labubu,” Chris Pereira, founder and chief executive of consultancy firm iMpact, told BBC News.

“They’re so good that no one cares they’re from China. You can’t ignore them.”

Meanwhile, Labubu continue to rack up social media followers with millions watching new owners unbox their prized purchase. One of the most popular videos, posted in December, shows curious US airport security staff huddling around a traveller’s unopened Labubu box to figure out which doll is inside.

That element of surprise is a big part of the appeal, says Desmond Tan, a longtime collector, as he walks around a Pop Mart store in Singapore vigorously shaking blind boxes before deciding which one to buy. This is a common sight in Pop Mart.

Desmond collects “chaser” characters, special editions from Pop Mart’s various toy series, which include Labubu. On average, Desmond says, he finds a chaser in one out of every 10 boxes he buys. It’s a good strike rate, he claims, compared to the typical odds: one in 100.

“Being able to get the chaser from shaking the box, learning how to feel the difference…,” is deeply satisfying for him.

“If I can get it in just one or two tries, I’m very happy!”