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The chief executive of National Grid has claimed that Heathrow Airport had enough power from other substations despite Friday’s shutdown.

Around 1,300 flights were affected after a fire knocked out an electricity substation in Hayes on Thursday evening. Operations were not able to resume until Friday evening.

John Pettigrew from National Grid said there were two other substations “always available for the distribution network companies and Heathrow to take power”.

The aftermath of the substation fire. Pic: Reuters
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The aftermath of the substation fire. Pic: Reuters

New fire footage at Heathrow
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The substation fire

In his first comments since the disruption, Mr Pettigrew told the Financial Times: “There was no lack of capacity from the substations.

“Each substation individually can provide enough power to Heathrow.”

He added: “Losing a substation is a unique event – but there were two others available.

“So that is a level of resilience.”

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In response to the comments, a Heathrow Airport spokesperson said: “As the National Grid’s chief executive, John Pettigrew, noted, he has never seen a transformer failure like this in his 30 years in the industry.

“His view confirms that this was an unprecedented incident and that it would not have been possible for Heathrow to operate uninterrupted.

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Flight cancellations at Heathrow have left hundreds of thousands of passengers stranded around the globe
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Flight cancellations at Heathrow left hundreds of thousands of passengers stranded around the globe

“Hundreds of critical systems across the airport were required to be safely powered down and then safely and systematically rebooted. Given Heathrow’s size and operational complexity, safely restarting operations after a disruption of this magnitude was a significant challenge.”

Heathrow chief executive Thomas Woldbye previously said a back-up transformer failed during the power outage, meaning systems had to be closed in accordance with safety procedures so power supplies could be restructured from two remaining substations.

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But it has emerged that a report by consultancy firm Jacobs more than 10 years ago found a “key weakness” of Heathrow’s electricity supply was “main transmission line connections to the airport”.

The document, published in 2014, stated “outages could cause disruption to passenger, baggage and aircraft handling functions”, and “could require closure of areas of affected terminals or potentially the entire airport”.

In its appraisal of operational risk at the airport, Jacobs said provision of on-site generation and other measures to ensure resilient supply appeared “to be adequate” to enable Heathrow “to withstand and recover from interruptions to supply”.

The report added that the airport operated “within risk parameters that are not excessive or unusual for an airport of its type”.

Metropolitan Police counter-terrorism officers initially led the investigation but the force said the fire is not believed to be suspicious so the London Fire Brigade is now leading the probe which will focus on the electrical distribution equipment.

Heathrow is Europe’s largest airport, with more than 83.9 million passengers travelling through its terminals in 2024. Around 200,000 passengers were affected by Friday’s closure.

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How to see today’s partial solar eclipse from the UK

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How to see today's partial solar eclipse from the UK

Stargazers could catch a glimpse of a partial solar eclipse this morning, where the sun looks like it’s had a bite taken out of it.

It only occurs a handful of times a year, when the moon passes between the sun and Earth, and partly obscures the star.

Here’s what you need to know for the best chance of seeing it.

When is it?

It’s expected to be visible in the UK from 9.56am to 12.14pm today.

For people in the south of England – where the weather means views should be best – the peak of the eclipse is set to be at around 11.03am.

This is when the eclipse reaches its “maximum” – the moment when the greatest portion of the sun is hidden.

According to the Royal Observatory, the maximum this time will see around 30-40% of the sun obscured.

What is the weather meant to be like?

Some parts of the UK will see more of the eclipse than others. Northwest Scotland is expected to see the most coverage with 47.9% in Gallan Head.

Dover in southwest England is set to see the least coverage of the eclipse with only 28.1% of the sun blocked by the moon, while Manchester is expected to have 36.1% of coverage.

Check the forecast where you are

Met Office meteorologist Alex Burkill said: “The further northwest you are in the UK the more of an eclipse you are likely to have, whereas towards the southeast it’s a little bit less – but still 30%, and still a large chunk taken out of the sun.”

Met Office maps show clear skies across southeast England at the time that the eclipse starts, with partial cloud above Manchester and northwest England, and cloud above most of Scotland.

The areas expected to have some of the best eclipse coverage are also likely to see cloud and rain at the time.

Conditions are widely meant to clear over the weekend, with temperatures up to 17C in the South East and 14C in the North on Sunday – but it may come slightly too late to have a good view of the sun today.

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How can I give myself the best chance of seeing it?

Even though part of the sun will be covered, its brightness will still be dangerous to the naked eye, so experts say it can cause serious and permanent damage if you look straight at it without appropriate protection.

Also: standard sunglasses do not count as protection.

If you want more than a quick glance, you can use a pinhole projector or solar eclipse viewing glasses.

You can make pinhole projectors at home, simply by making a hole in a piece of card, holding the card up to the sun and holding another piece of paper behind the card.

The shape of the sun will appear projected onto the paper, without harming you.

Solar eclipse viewing glasses can be purchased online.

For those who can’t see it in person, the Royal Observatory is streaming the partial eclipse live through one of its modern telescopes on its YouTube channel, with coverage starting from 10am.

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UK weather: Spring sunshine set to return on Mother’s Day, forecasters say

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UK weather: Spring sunshine set to return on Mother's Day, forecasters say

Spring sunshine will return to parts of the UK in time for Mother’s Day and continue into next week – potentially bringing the hottest day of the year so far, forecasters have said.

Sky weather producer Kirsty McCabe said Mothering Sunday was likely to be a “mostly fine day with bright or sunny spells once early low cloud and drizzle clears”.

She predicted there would be “temperatures near or above average” for most places.

Afterwards, however, high pressure is set to dominate. There is a good chance the highest temperature of the year so far will be reached by the middle of next week, topping the high of 21.3C (70F) recorded on 20 March.

Latest UK weather forecast

However, the far north and west of the British Isles are likely to be cloudier and windier with a risk of rain.

The Met Office has also forecast that warm conditions will return on Sunday after a brief, changeable period in what it called “typical spring fashion”.

Central and inland areas should have the warmest weather on Mother’s Day, with its forecasters also predicting “a short-lived spell of unsettled weather this weekend”.

A woman sitting in Green Park, central London, during a spell of warm weather. Picture date: Friday March 28, 2025, 2025. PA Photo. Photo credit should read: Ben Whitley/PA Wire
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A woman enjoys the warmer weather in London’s Green Park. Pic: PA

But the Met Office added the country would “transition back towards a blocked weather pattern as high pressure builds on Sunday and dominates our weather through much of next week”.

Honor Criswick, a meteorologist from the agency, said the high pressure would “stick around as we head into next week, bringing some fine and settled conditions, perhaps even some warm sunshine”.

Partial solar eclipse in parts of UK

Ms Criswick said Sunday morning would be cloudy, with possible drizzle and mist, but that would give way to a dry day with “some sunny spells, particularly across central and inland areas of the UK”.

She predicted there would be “quite a settled start to the week next week, lots of sunny spells and also some quite warm temperatures”.

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Meanwhile, a partial solar eclipse will be visible in parts of the UK between 10am and noon on Saturday.

Those in the east of the country will have the best chance of seeing it.

The phenomenon occurs when the moon passes between the sun and the Earth. However, the three planetary bodies will not be completely aligned, meaning only part of the sun will be obscured this weekend.

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‘Sensitive military documents’ found in Newcastle street

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'Sensitive military documents' found in Newcastle street

“Appropriate action” will be taken following the discovery of sensitive military documents on a street in Newcastle, Downing Street has said.

An investigation has been launched by the Ministry of Defence (MoD) after the paperwork was found spilling out of a black bin bag in the Scotswood area of the city on 16 March.

The BBC reported that the documents included details of soldiers’ ranks, shift patterns, email addresses, weapon issue records and access information for military facilities.

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The broadcaster reported the paperwork related to units based at Catterick Garrison in North Yorkshire, around 50 miles south of Newcastle.

In a statement, the MoD said it did not believe there had been a significant security breach.

A spokesperson said: “We take the protection of our information very seriously and this incident is being closely investigated.

“We have rapidly reviewed the information and understand no sensitive operational defence information is contained within the documents.”

Among the paperwork was a sheet reportedly headed “armoury keys and hold IDS codes” – believed to refer to an armoury and intruder detection system.

A Number 10 spokesperson said: “The Ministry of Defence is currently looking at documents handed to the police, but the matter is the subject of an ongoing investigation by the Army.

“As you will appreciate, I won’t be able to comment on any specifics while that takes place, but you can expect that appropriate action will be taken in response to any potential information breach.

“It’s obviously important that that investigation is allowed to take its course.”

The discovery was made by Mike Gibbard, a football fan from Gateshead, who stumbled across the documents while parking ahead of Newcastle United’s Carabao Cup final match against Liverpool.

He told the BBC: “I peered down and started to see names on bits of papers, and numbers, and I thought ‘what’s that?’

“They were piled up against a wall, in a black bag, in the road, underneath cars – spread all the way up the road.”

He said he found more documents on the other side of the road and was alarmed by the contents.

“Details of the perimeter, the patrol, checking weapons in and out, requests for leave, mobile phone numbers, high-ranking officers,” he told the BBC.

“This shouldn’t be here, anyone could pick it up.”

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The documents were handed to Northumbria Police. A spokesperson for the force said they were subsequently given to the MoD.

Government guidelines recommend that some “official – sensitive” documents could pose a “threat to life” if compromised. The advice states that such paperwork should be destroyed using shredders or “burn bags”.

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