This issue “is currently being investigated”, National Rail said, warning it expects the delays affecting some of its services to last until midday.
“Trains across the network are having to start their journeys later because of this fault and some may also be subject to cancellations or alterations,” it added.
Posting an update on social media, it said services across the Gatwick Express, Great Northern, Southern and Thameslink network may be cancelled, delayed by up to 15 minutes or revised.
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Services to Heathrow Airport on the Elizabeth line have also been affected, with passengers told to wait for the next available train.
Those using ScotRail are now allowed to travel via “any reasonable route” because of the issue.
South Western Railway also told passengers its services may be delayed.
For those seeking compensation, National Rail has advised customers to keep hold of train tickets and to make a note of the journey, as both would support any claim.
Helen Dewdney, a consumer rights expert who runs The Complaining Cow site, said passengers are entitled to a 50% refund for a delay of more than 60 minutes.
One passenger travelling from Portsmouth to Basingstoke at 6.32am said he had to pay £54 for a taxi through Uber as it’s the first week of his new job.
Matthew told Sky News he will claim the money back from South Western Railway.
GSMR is designed to enable drivers and signallers to communicate digitally at all times, including while trains are in tunnels or areas where analogue systems did not work.
It was rolled out to increase safety and reduce costs by replacing the patchwork of expensive and inefficient legacy systems.
A total of 36,816 migrants crossed the English Channel to the UK in 2024, provisional government figures show.
The figure is up 25% on 2023 when 29,437 people arrived in small boats.
The number successfully making the journey in 2024 is the second-highest since records began in 2018. The total, however, is down 20% on the record 45,774 arrivals in 2022.
The number of people who died while making the hazardous journey was not published in the Home Office data.
More people have been arriving since the figures began to be collated. In 2018 there were 299 people who arrived, in 2019 there were 1,843 which more than quadrupled to 8,466 in 2020 before tripling to 28,526 individuals in 2021.
The last crossings of the year took place on 29 December, when 291 people made the journey from France in six boats.
This breaking news story is being updated and more details will be published shortly.
The UK celebrated the start of 2025 with a spectacular fireworks display on the banks of the River Thames – as London defied weather concerns which led to the cancellation of other events around the country.
Thousands listened to Big Ben ring in the new year after celebrations had already taken place across the world – with fireworks lighting up the night skies in major cities including Sydney in Australia, Mumbai in India and Damascus in Syria.
The 11-minute display in the UK capital took place over the London Eye and began with the message “Your New Year Is Unwritten”.
To a diverse soundtrack which featured music from the likes of Sir Elton John, One Direction and Charli XCX, the display looked back at 2024 with topics including the weather, the Paris Olympics, the Paralympics and Euro 2024.
There were also voiceovers from British actress Dame Imelda Staunton and actor Sir Ian McKellen.
The London mayor’s office said around 100,000 ticketholders had attended the display, which included more than 12,000 fireworks and 420 lights.
The display ended with a message from Paddington Bear that “anyone can fit in” in London before a version of Auld Lang Syne by Boney M.
UK celebrations fall victim to bad weather
Meanwhile, crowds sheltered under umbrellas to watch fireworks and enjoy entertainment in Manchester, but the weather curtailed celebrations elsewhere with fireworks displays cancelled in Blackpool, Newcastle, Ripon in North Yorkshire and the Isle of Wight.
The first country to welcome in the new year was the Pacific nation of Kiribati at 10am UK time.
It was followed by New Zealand an hour later – with fireworks launched from the Sky Tower in Auckland as part of a spectacular light show.
At 1pm UK time it was Australia’s turn to usher in 2025.
A stunning fireworks display lit up the sky above Sydney Harbour Bridge as more than one million people watched below.
British pop star Robbie Williams led a singalong moments earlier outside Sydney Opera House, with indigenous ceremonies and performances also taking place in the build up to the celebrations.
A couple of hours later the clocked ticked into 2025 in South Korea, North Korea and Japan.
In the South Korean capital Seoul, a bell tolling and countdown ceremony took place in the historic Bosingak Pavilion.
On the other side of the demilitarised zone, North Korea said goodbye to 2024 with a fireworks display in Kim II Sung Square in the capital Pyongyang.
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The world celebrates 2025
At the same time crowds had gathered at a temple in central Tokyo to watch a traditional bell-ringing ceremony, known as Joya no Kane.
An hour later fireworks kicked off 2025 with a bang in Hong Kong and Taiwan.
It came as crowds in the Chinese capital Beijing gathered in Shougang Park to celebrate the start of 2025.
In the Thailand capital Bangkok, fireworks blasted off in style over Chao Phraya River, while in Malaysia people gathered near the Petronas Twin Towers, Kuala Lumpur, to celebrate the New Year.
A fireworks display in Indonesia’s Jakarta featured 800 drones.
A couple of hours later it was India’s turn to say goodbye to 2024, with thousands of people in Mumbai flocking to the city’s bustling promenade facing the Arabian Sea.
In the United Arab Emirates city of Dubai, thousands attended a dazzling light and fireworks show at the Burj Khalifa, the world’s tallest skyscraper.
It came before hundreds gathered in the Syrian capital Damascus to sing, dance and watch a fireworks display – with many looking forward to a new beginning weeks after rebels ousted President Bashar al Assad.
Hours later countries in Europe began to celebrate the start of 2025.
Paris appeared to have spared no expense with its display at the Champs-Elysees.
The French capital was capping a momentous 2024 following the Summer Olympics and Paralympic Games.
Meanwhile, Rome’s traditional New Year’s Eve festivities had an additional draw: the start of Pope Francis’ Holy Year, the once-every-quarter-century celebration projected to bring some 32 million pilgrims to the Eternal City in 2025.
At 3am UK time, A huge fireworks display thrilled crowds gathered on Copacabana Beach in Rio de Janeiro as Brazil welcomed the new year.
More than two million people were expected to descend on the beach for the celebration.
Two hours later thousands of people celebrated the start of 2025 in Times Square in New York.
Crowds cheered and couples kissed when a crystal-covered ball weighing almost six tons descended down a pole in the square to signal the beginning of the new year.
The Times Square celebrations also included musical performances by TLC and Jonas Brothers.
Elsewhere, Chinese state media covered an exchange of new year’s greetings between leader Xi Jinping and Russian president Vladimir Putin in a reminder of the growing closeness between two leaders who face tensions with the West.
Meanwhile, a blackout hit nearly all of Puerto Rico early on Tuesday as the US territory prepared to celebrate New Year’s Eve.
More than 1.2 million out of 1.47 million customers were without power, according to Luma Energy, a private company that oversees electricity transmission and distribution on the island.
It was not immediately clear what caused the widespread outage or when power would be restored.
A new amber warning for heavy rain has been issued for parts of England this evening, as wet and windy weather elsewhere in the country forced the cancellation of New Year’s Eve celebrations.
A spokesperson said events in the city centre of the Scottish capital, including fireworks from the castle, are unable to go ahead “on the grounds of public safety” due to “high winds and inclement weather”.
Meanwhile, organisers of a planned fireworks display in Blackpool said it has also been cancelled due to the weather.
Visit Blackpool said only the pyrotechnics have been affected, with the rest of the New Year’s Eve Family Party to continue as planned, including free ice skating and a projection light show.
More bad news came on Tuesday evening when the Met Office issued an amber warning for rain over an area from Preston to Bradford. It is in place as of 8.38pm on Tuesday evening until 9am on Wednesday morning.
“Persistent and, at times heavy, rain will continue overnight before clearing southwards on Wednesday morning,” the forecaster said.
“40-50mm rain is expected fairly widely, with 50-100mm across west-facing hills. There is a chance a few locations could see in excess of 100mm.”
Almost every part of the UK is covered by at least one of multiple Met Office weather warnings over the course of Tuesday and Wednesday.
Another fireworks event in Ripon, North Yorkshire, also succumbed to the weather, with the council posting on Facebook that the event planned to take place in the city’s Market Square could not go ahead due to high winds.
While a homemade boat race in Poole in Dorset, a sea dip in Lyme Regis in the same south coast county, as well as fireworks displays on the Isle of Wight and on Newcastle’s Quayside, were all cancelled on Tuesday morning.
Although London’s City Hall had said it was “monitoring the weather”, mayor Sadiq Khan this evening reassured visitors the fireworks would go ahead.
London mayor Sir Sadiq told the PA news agency: “I’m really excited about the London New Year’s Eve fireworks, the biggest fireworks taking place anywhere across Europe.
“Hundreds of thousands of fireworks, great light display but also a great soundtrack tonight as well.”
Rain, wind and snow warnings
Three separate weather warnings currently cover Scotland alone for Tuesday evening, including a yellow warning for “persistent snow” over Shetland and Orkney, a yellow warning for rain and snow in the north, which could bring possible blizzard conditions, especially over high ground in Sutherland and Caithness.
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Hogmanay event cancelled
A yellow warning for wind spans from Glasgow to Edinburgh, and the Met Office has warned of possible delays to road, rail, air and ferry transport.
Train operator ScotRail warned its services were being disrupted by speed restrictions due to “very heavy rainfall”.
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At least 11 lines have been affected, according to the ScotRail website, and 18 trains were cancelled on Tuesday morning.
Network Rail said it closed the Highland Main Line at Kingussie because of “more extreme rainfall overnight”.
Forecasters say the high winds and rain may also cause flooding, particularly in the Midlands and Pennines, with the Environment Agency urging people to stay away from swollen rivers and avoid driving through floodwater.
In the Highlands, flooding has forced the closure of the A9 at Tomich.
‘Tricky couple of days’
As the clock strikes midnight in the UK, separate warnings for wind and rain are in place for Wednesday.
Strong winds are forecast across much of England and Wales until 3pm on 1 January, with gusts of 75mph likely around coastal areas and hills, according to the Met Office.
The period from Thursday to Saturday is expected to be a “widely cold but sunny few days, with wintry showers mainly confined to coastal areas.
“Northern areas may see patchy rain, sleet and snow move in on Saturday.”.