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An electrical substation fire and an entire airport shut down – with over 1,000 flights cancelled, others rerouted worldwide, and 200,000 passengers affected by the disruption.

The Heathrow closure on Friday really highlights the ‘critical’ part of critical national infrastructure (CNI) – the systems and facilities that are essential for society to function.

At best it’s an embarrassment. At worst, it points to serious vulnerabilities across the country that could be exploited by bad actors.

Heathrow first.

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Heathrow needs a lot of power, the equivalent of a small town, and the bulk of this is supplied by a dedicated connection at the North Hyde substation – reflecting Heathrow’s critical status.

But that also appears to be the problem – because Heathrow requires so much power, having a second dedicated connection would likely be prohibitively expensive, especially for the low probability scenario of such a catastrophic fire. This is the first time this has happened in decades, after all.

“Fires like this are not common at all,” said Dr Robin Preece, a reader in future power systems at the University of Manchester. “If it just broke down without catching fire… you might never have noticed anything as we have sufficient alternative routes for the electricity to follow.”

Photo taken with permission from the social media site X, formerly Twitter, posted by @JoselynEMuirhe1 of the fire at Hayes electrical substation. More than 1,300 flights to and from Heathrow Airport will be disrupted on Friday due to the closure of the airport following the fire. Issue date: Friday March 21, 2025.
Image:
The fire at the North Hyde electrical substation. Pic: @JoselynEMuirhe1

But uncommon doesn’t mean impossible – and when infrastructure is critical, it’s supposed to be protected.

MI5 in charge of critical infrastructure protection

The organisation ultimately responsible is MI5, through the National Protective Security Authority. This lists 13 national infrastructure sectors, from chemicals to nuclear, emergency services to food, space to water.

It’s a lot to look after – this map shows just some of the sites that would be considered CNI. Airports and power stations. Or the tubes that supply us with energy (gas and fuel pipelines) and internet (undersea cables).

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Many of those risks are collected in the National Risk Register. This plots the likelihood and the impact of a risk.

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Measuring risk chances and impact

So an accidental fire or explosion at an onshore fuel pipeline is estimated to have less than a 0.2% chance of happening in the next two years but would have only a “moderate” impact, defined as between 41-200 casualties and/or hundreds of millions of pounds in economic losses.

A civil nuclear accident has a similar probability but would have a “catastrophic” impact, defined as the loss of more than 1,000 lives and/or an economic cost of tens of billions of pounds. Pandemics also meet the catastrophic impact threshold.

A regional failure of the electricity network, one due perhaps to “a specific power substation”, is listed as having a 1% to 5% chance of happening every two years, and a moderate impact. But this is what happened to Heathrow – and the impact doesn’t appear moderate at all.

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Read more:
How Heathrow closure ruined travel plans
What we know about shutdown as flights grounded

The North Hyde electrical substation which caught fire. 
Pic: PA
Image:
The electrical substation in west London. Pic: PA

Catalogue of vulnerabilities

The National Risk Register is sensible planning but it’s also a catalogue of vulnerabilities.

Accidents do happen, but so do attacks. It can be hard to tell the difference – and that’s the point of what are known as “grey zone” attacks.

For example, undersea cables keep unfortunately being cut, whether in the Baltic Sea or the waters around Taiwan.

Taiwan has accused China of doing this deliberately. China responded by saying that damage to undersea cables is a “common maritime accident”.

In this photo released by the Taiwan Coast Guard, Taiwanese Coast Guard vessels prepare to board Togolese-flagged cargo ship Hongtai suspected of severing an undersea communications cable in waters between its main island's west coast and the outlying Penghu islands early Tuesday, Feb 25, 2025. (Taiwan Coast Guard via AP)
Image:
Taiwanese coastguard in February prepares to board a cargo ship suspected of severing an undersea communications cable. Pic: AP

“Malicious actors see opportunities and vulnerabilities”, Marco Wyss, Professor of International History and Security at Lancaster University, told Sky News.

“And if you showcase vulnerabilities to such an extent as today, even if it wasn’t a malicious actor, it can give them some ideas.”

Additional reporting by Sophia Massam, junior digital investigations journalist

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‘A constant game of cat and mouse’: Inside the crackdown on illegal moped delivery drivers

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'A constant game of cat and mouse': Inside the crackdown on illegal moped delivery drivers

The first thing you notice when immigration officers stop a possible illegal moped delivery driver is the speed in which the suspect quickly taps on their mobile.

“We’re in their WhatsApp groups – they’ll be telling thousands now that we’re here… so our cover is blown,” the lead immigration officer tells me.

“It’s like a constant game of cat and mouse.”

Twelve Immigration Enforcement officers, part of the Home Office, are joining colleagues from Avon and Somerset Police in a crackdown on road offences and migrants working illegally.

Police chase suspected illegal immigrant working as a delivery drivers

The West of England and Wales has seen the highest number of arrests over the last year for illegal workers outside of London.

“It is a problem… we’re tackling it,” Murad Mohammed, from Immigration Enforcement, says. He covers all the devolved nations.

“This is just one of the operations going on around the country, every day of the week, every month of the year.”

Murad Mohammed from Immigration Enforcement
Image:
Murad Mohammed, from Immigration Enforcement, says his team are attempting to tackle the issue

Just outside the Cabot Circus shopping complex, we stop a young Albanian man who arrived in the UK on the back of a truck.

He’s on an expensive and fast-looking e-bike, with a new-looking Just Eat delivery bag.

He says he just uses it for “groceries” – but the officer isn’t buying it. He’s arrested, but then bailed instantly.

A man inspects the Just Eat food delivery bag of a suspected illegal immigrant working as a delivery driver

We don’t know the specifics of his case, but one officer tells me this suspected offence won’t count against his asylum claim.

Such is the scale of the problem – the backlog, loopholes and the complexity of cases – that trying to keep on top of it feels impossible.

This is one of many raids happening across the UK as part of what the government says is a “blitz” targeting illegal working hotspots.

Angela Eagle, the border security and asylum minister, joins the team for an hour at one of Bristol’s retail parks, scattered with fast food chains and, therefore, delivery bikes.

Angela Eagle, Minister for Border Security and Asylum
Image:
Border security and asylum minister, Angela Eagle, speaks to Sky News

She says arrests for illegal working are up over the last year by 51% from the year before, to more than 7,000.

“If we find you working, you can lose access to the hotel or the support you have [been] given under false pretences,” she said.

“We are cracking down on that abuse, and we intend to keep doing so.”

A suspected illegal immigrant working as a delivery driver being arrested

There are reports that asylum seekers can rent legitimate delivery-driver accounts within hours of arriving in the country – skipping employment legality checks.

Uber Eats, Deliveroo, and Just Eat all told Sky News they’re continuing to strengthen the technology they use to remove anyone working illegally.

But a new Border Security Bill, working its way through Parliament, could see companies fined £60,000 for each illegal worker discovered, director disqualifications and potential prison sentences of up to five years.

“I had them all in to see me last week and I told them in no uncertain terms that we take a very tough line on this kind of abuse and they’ve got to change their systems so they can drive it out and off their platforms,” the minister tells me.

Read more:
Welfare bill passes final Commons stage after another concession
Ex-Tory chairman defects to Reform
Wealth tax could be coming to the UK – what is it?

The gig economy – so prevalent in every city – creates another incentive for those wanting to risk their lives coming to the UK illegally.

More than 20,000 migrants have crossed the English Channel to the UK in 2025 – a record number at this point of the year.

A suspected illegal immigrant working as a delivery driver holds his helmet

For some of those who arrive, a bike and a phone provide a way to repay debts to gang masters.

There were eight arrests today in Bristol, one or two taken into custody, but it was 12 hours of hard work by a dozen immigration officers and the support of the police.

As two mopeds are pushed onto a low-loader, you can’t help but feel, despite the best intentions, that at the moment, this is a losing battle.

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This flimsy vessel carrying migrants could reach British waters in a few hours’ time

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This flimsy vessel carrying migrants could reach British waters in a few hours' time

We see the boat from a distance – the orange of the life jackets reflected in the rising sun.

And as we draw closer, we can make out dozens of people crowded on board as it sets off from the shore, from a beach near Dunkirk.

There is no sign of any police activity on the shore, and there are no police vessels in the water.

Instead, the migrants crammed into an inflatable dinghy are being watched by us, on board a private boat, and the looming figure of the Minck, a French search and rescue ship that soon arrives.

Picture to go with Adam Parsons' eyewitness of migrants crossing on 10/07/25
Image:
Minck, a French search and rescue ship, shadows the boat

The dinghy meanders. It’s not heading towards Britain but rather hugging the coast.

A few of the passengers wave at us cheerfully, but then the boat starts to head back towards the shore.

Picture to go with Adam Parsons' eyewitness of migrants crossing on 10/07/25
Image:
Sky’s Adam Parsons at the scene

As it nears a different beach, we see a police vehicle – a dune buggy – heading down to meet it.

Normal practice is for French police officers to slice through the material of any of these small boats that end up back on shore.

Two police officers get out of the buggy and wait. A police helicopter arrives and circles above, performing a tight circle over the heads of the migrants.

The police think they might be about to go back on to the beach; in fact, these passengers know that most of them are staying put.

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The boat stops a short distance from the shore and four people jump out. As they wade towards the beach, the boat turns and starts to head back out to sea.

We see the two police officers approach these four men and have a brief conversation.

They don’t appear to check the bags they are carrying and, if they do question them about why they left the boat, it is the most cursory of conversations.

In reality, these people probably don’t speak French but they were almost certainly involved in arranging this crossing, which is against the law. But all four walk away, disappearing into the dunes at the back of the beach.

Read more:
Why do so many from around the world try to cross the Channel?
Channel crossings rise by 50% in first six months of 2025

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Why do migrants want to come to the UK?

We follow the boat as it chugs off in the direction of Britain, carrying around 50 people.

The Minck returns to shadowing its progress, but its job is limited to offering help if the boat gets into trouble.

Otherwise, if the engine keeps working, then this flimsy vessel will reach British waters in a few hours’ time.

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UK

‘A constant game of cat and mouse’: Inside the police crackdown on illegal moped delivery drivers

Published

on

By

'A constant game of cat and mouse': Inside the crackdown on illegal moped delivery drivers

The first thing you notice when immigration officers stop a possible illegal moped delivery driver is the speed in which the suspect quickly taps on their mobile.

“We’re in their WhatsApp groups – they’ll be telling thousands now that we’re here… so our cover is blown,” the lead immigration officer tells me.

“It’s like a constant game of cat and mouse.”

Twelve Immigration Enforcement officers, part of the Home Office, are joining colleagues from Avon and Somerset Police in a crackdown on road offences and migrants working illegally.

Police chase suspected illegal immigrant working as a delivery drivers

The West of England and Wales has seen the highest number of arrests over the last year for illegal workers outside of London.

“It is a problem… we’re tackling it,” Murad Mohammed, from Immigration Enforcement, says. He covers all the devolved nations.

“This is just one of the operations going on around the country, every day of the week, every month of the year.”

Murad Mohammed from Immigration Enforcement
Image:
Murad Mohammed, from Immigration Enforcement, says his team are attempting to tackle the issue

Just outside the Cabot Circus shopping complex, we stop a young Albanian man who arrived in the UK on the back of a truck.

He’s on an expensive and fast-looking e-bike, with a new-looking Just Eat delivery bag.

He says he just uses it for “groceries” – but the officer isn’t buying it. He’s arrested, but then bailed instantly.

A man inspects the Just Eat food delivery bag of a suspected illegal immigrant working as a delivery driver

We don’t know the specifics of his case, but one officer tells me this suspected offence won’t count against his asylum claim.

Such is the scale of the problem – the backlog, loopholes and the complexity of cases – that trying to keep on top of it feels impossible.

This is one of many raids happening across the UK as part of what the government says is a “blitz” targeting illegal working hotspots.

Angela Eagle, the border security and asylum minister, joins the team for an hour at one of Bristol’s retail parks, scattered with fast food chains and, therefore, delivery bikes.

Angela Eagle, Minister for Border Security and Asylum
Image:
Border security and asylum minister, Angela Eagle, speaks to Sky News

She says arrests for illegal working are up over the last year by 51% from the year before, to more than 7,000.

“If we find you working, you can lose access to the hotel or the support you have [been] given under false pretences,” she said.

“We are cracking down on that abuse, and we intend to keep doing so.”

A suspected illegal immigrant working as a delivery driver being arrested

There are reports that asylum seekers can rent legitimate delivery-driver accounts within hours of arriving in the country – skipping employment legality checks.

Uber Eats, Deliveroo, and Just Eat all told Sky News they’re continuing to strengthen the technology they use to remove anyone working illegally.

But a new Border Security Bill, working its way through Parliament, could see companies fined £60,000 for each illegal worker discovered, director disqualifications and potential prison sentences of up to five years.

“I had them all in to see me last week and I told them in no uncertain terms that we take a very tough line on this kind of abuse and they’ve got to change their systems so they can drive it out and off their platforms,” the minister tells me.

Read more:
Welfare bill passes final Commons stage after another concession
Ex-Tory chairman defects to Reform
Wealth tax could be coming to the UK – what is it?

The gig economy – so prevalent in every city – creates another incentive for those wanting to risk their lives coming to the UK illegally.

More than 20,000 migrants have crossed the English Channel to the UK in 2025 – a record number at this point of the year.

A suspected illegal immigrant working as a delivery driver holds his helmet

For some of those who arrive, a bike and a phone provide a way to repay debts to gang masters.

There were eight arrests today in Bristol, one or two taken into custody, but it was 12 hours of hard work by a dozen immigration officers and the support of the police.

As two mopeds are pushed onto a low-loader, you can’t help but feel, despite the best intentions, that at the moment, this is a losing battle.

Continue Reading

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