A “technical issue” at British Airways has delayed flights, reportedly for thousands of passengers.

Travel journalist Simon Calder said on X: “British Airways IT system failure is causing delays of 1-2 hours on many BA flights this evening… As delays build up I fear there will be cancellations tonight/tomorrow.”

In a statement on Monday evening, British Airways said flights were “currently operating, but are experiencing delays” and that its teams were working to “resolve a technical issue affecting some of our systems”.

Later they said it had been resolved: “Our teams worked hard to resolve an issue we experienced for a short time earlier this evening.

“We’ve apologised to customers for delays to their flights and ensured they were able to reach their destinations as planned.”

Earlier media reports suggested dozens of flights were grounded and that communications systems were affected.

One X user pictured people queueing on the tarmac in Verona, Italy. “What has happened to the nations airline? Not fit for purpose,” they said.

Replying to another X user BA said: “Our website is down. We are doing all we can to return online as soon as possible.

“Hopefully not too long before the Captain has his load sheet. Thanks for your understanding. Have a good journey when it is safe for you to be airborne.”

A spokesperson for Heathrow Airport said: “We are aware of a technical issue that British Airways are investigating, and we will be working with them to provide updates to passengers as soon as they are available. Heathrow systems are operating as normal.”

In June many British Airways (BA) flights in Heathrow were delayed by several hours by a “technical fault” with baggage handling.

BA said there had been a “temporary technical fault” which had disrupted its baggage system at the airport and had apologised for the problems it caused.

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In January “intermittent issues” with the airline’s app and website meant customers could not access them.

BA’s customer score for long-haul flights was the joint third lowest out of 17 carriers analysed by Which? in February.

The UK is being warned to brace for a further cold snap with “disruptive snow” set to sweep in across parts of the country as temperatures plummet.

The Met Office has issued three new yellow weather alerts for snow and ice from Monday.

The forecaster has warned up to 20cm of snow may accumulate in the worst affected areas as the country experiences its “first taste of winter”.

Check the forecast in your area

It comes as the first amber cold health alerts of the season have been issued by the UK Health Security Agency (UKHSA) covering all of England, except the South, until 6pm on Saturday.

An amber warning is issued when the weather is likely to “cause significant impacts across health and social care services”, according to the HSA.

That includes the potential for a rise in deaths, particularly among older people or those with health conditions.

Dr Agostinho Sousa, head of extreme events and health protection at the UKHSA, said: “It is vital to check in on vulnerable friends, family and neighbours to ensure they are well prepared for the onset of cold weather. Particularly if they are elderly or otherwise at increased risk.”

Meanwhile yellow health alerts – the second lowest alert level – are in place for the South East, South West and London.

Temperatures dropped to -7.8C (18F) in Tulloch Bridge in the Scottish Highlands in the early hours of Monday, which is the lowest temperature the UK has seen since last winter.

Snow dusted grounds across Aberdeenshire, including at Glenshee Ski Centre and at Corgarff, as well as alongside the A939 near The Lecht in the Cairngorms.

Snow also blanketed the mountain of Ingleborough, while there was a sprinkling of frost near Clapham, in the Yorkshire Dales.

More expected in coming days

Met Office spokesperson Nicola Maxey said snow has mostly fallen on hilltops so far, with 2cm falling in Lerwick, Shetland.

But more snow and ice is expected over the coming days, with temperatures plunging to below average levels for the time of year.

“It is going to be quite a widely cold week,” Ms Maxey said. “A few degrees below average both day and night for most of the country.”

The fresh warning for Northern Ireland comes into force from 3pm today and runs until 10am on Tuesday.

The alert takes in the likes of Newry, Belfast, Omagh, Derry and Ballycastle.

The warning in Scotland comes into force from 4pm and runs until 10am on Wednesday.

The alert covers the Highlands and Islands and the northeast of the country, including Aberdeen, Aberdeenshire and Moray.

A third warning – stretching across parts of England and Wales – comes into force at 7pm and runs until 10am on Tuesday.

East Midlands, Yorkshire, and the north of England are expected to be worst hit.

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‘Slight chance’ communities could be cut off

Those in the impacted areas have been told power cuts are possible and mobile phone coverage might be affected.

The Met Office has said there is a “slight chance” some rural communities could be cut off and that bus and train services may be delayed or cancelled.

People have also been warned to be careful not to slip or fall on icy surfaces.

Snow ‘even down to lower levels’

Tom Morgan, Met Office meteorologist, said: “We could see some disruptive snow in the Pennine regions, in particular, the Peak District as well, especially Monday night, but we could well see some impacts lasting on until Tuesday morning’s rush hour.

“Even down to lower levels, we could well see some snow as well, so quite a bit of disruption possible by Tuesday morning, and then the week ahead is likely to stay cold nationwide, a windy day on Tuesday, and then winter showers through the week ahead.”

Mr Morgan said that despite a “mild” start to the month, the cold conditions are more typical of “mid-winter to late-winter”.

“What we can say is that it’s going to be very cold for the time of year, there will be widespread overnight frosts, and a few locations where there’s snow on the ground,” he continued.

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Changes to weather warnings ‘likely’ in coming days

In southern England, a typical maximum temperature for this time of year is 11C (52F), but daytime highs for the week ahead are forecast to be around 5C (41F), while some parts of Scotland will reach “only just above freezing”, Mr Morgan said.

Mr Morgan said the public can best prepare for the wintry weather by checking their cars are suitable for icy and potentially snowy conditions and to take extra supplies including food, blankets and a fully charged mobile phone with them on journeys.

He added there were “likely” to be changes to the weather warnings in the coming days, and that “winter flurries” could be seen in the south of England later in the week.

Despite the cold conditions, the “whole of the UK” will enjoy more sunshine this week, he said.

He added: “There’ll be some snow showers in the peripheries of the UK, particularly northern Scotland, and down the east and the west coast, but if you live inland and you live in the south, there’ll be lots of sparkly blue skies on the most days through Tuesday to Friday.”

Davina McCall has made an “enormous leap forward in the last 24 hours”, her partner has said on her Instagram.

In an update, her partner Michael Douglas, said: “Update folks. Thanks so much to all the well wishers. She really has made an enormous leap forward in the last 24 hours. She is out of ICU She is ‘loving awareness’. Thank you xx Michael.”

The post also featured a bright pink text image, which said, “massive relief to see some light breaking through,” followed by four heart emojis.

“Thanks for all the good vibes coming in from all angles. Up and up,” it added.

Friends and fellow celebrities were quick to comment on the update, with actress Patsy Palmer writing, “sending healing,” Dame Kelly Holmes commenting “awesome news Michael” and Jools Oliver adding three heart emojis.

The 57-year-old television presenter had revealed in a video posted on Instagram earlier on Friday she had a benign brain tumour, a colloid cyst, which she described as “very rare”.

Speaking in the short video ahead of her operation, McCall had explained to her followers the benign tumour was around 14mm wide and “needed to come out, because if it grows it would be bad”.

She said a surgeon would remove the cyst through the top of her head in a procedure called a craniotomy.

In her video post, the former Big Brother host said she was “in good spirits,” and would be in hospital “for around nine days” following the procedure.

According to the NHS, non-cancerous brain tumours are slow-growing and unlikely to spread, but are still serious and can be life-threatening.

McCall’s partner is sharing updates from McCall’s account while she is recovering. This is his second update since her operation.

McCall rose to fame presenting on MTV in the mid-1990s, and later on Channel 4’s Streetmate, before becoming a household name as the host of Big Brother from 2000 to 2010.

She’s gone on to present programmes across the networks, and currently presents ITV dating show My Mum, Your Dad.

Last year, McCall was appointed Member of the Order of the British Empire (MBE) in the 2023 Birthday Honours for services to broadcasting.

In recent years, McCall has spoken regularly on women’s health and the effects of menopause in a bid to break taboos around the subject. Her 2022 book, Menopausing, won book of the year at the British Book Awards.

The same year, McCall fronted the Channel 4 documentary Davina McCall: Sex, Mind And The Menopause, and told the BBC that the perimenopausal symptoms caused her difficulties multi-tasking and she considered that she had a brain tumour or Alzheimer’s disease at the time.

Married twice, McCall has three children, two daughters and a son, with her second husband, presenter Matthew Robertson.

She has lived with Douglas since 2022, and they present a weekly lifestyle podcast together, Making The Cut.