Heathrow airport shutdown: Airport was warned beforehand

Investigative reports released on Wednesday, April 2, 2025, have revealed that Heathrow Airport was warned about the shutdown.

BBC reveals that the airport was notified about the “resilience” of its power supply in the days before a fire that shut down the airport for more than a day last month.

The boss of a group representing airlines told a group of Members of Parliaments (MPs) on Wednesday that he spoke to Heathrow on March 15 about his concerns.

He stated that he also spoke with them again on 19 March.

Heathrow Airline Operators’ Committee boss Nigel Wicking said he raised cases of “theft of wire and cable around some of the power supply.”

This he said temporarily took out runway lights, which are critical to passenger safety.

But Heathrow boss Thomas Woldbye said it was an “unlikely event” with “high consequence” that was “difficult to deal with”.

Mr Woldbye apologised to the nearly 300,000 passengers whose journeys were disrupted by the closure on 21 March.

He offered his “deepest regrets” adding that the “situation was unprecedented”. The airport was shutdown after a fire at an electrical substation.

Speaking to MPs on the transport committee, Mr Wicking said the temporary failure of the runway lights before the fire obviously made him concerned.

According to him, it therefore happened that he had raised the point.

“I wanted to understand better the overall resilience of the airport.”

He said he had spoken to the Team Heathrow director on March 15 about his concerns, six days before the fire.

He said he also spoke with the chief operating officer and chief customer officer on March 19, two days before the fire.

Mr Woldbye said the airport had to rely on contracts it has with Scottish and Southern Electricity Networks for making the network resilient.

It also made the network to improve, so that it all cames at a very high cost.

This he said, would raise costs for airlines, and passengers.

However, Mr Wicking said Heathrow is “already the most expensive airport in the world”.

He mentioned that as an airline, they had to be ready for unforseen situations.

Situations like capability and the understanding of when a power supply or an asset is not available, so as to know the next step to take.

On the day of the shutdown, airlines had to divert 120 aircraft, which is “not a light decision to be made in any context”, Mr Wickling added.

As a consequence, when Mr Wicking joined a call with NATs, the national air traffic service, at 05:30, “they’d run out of space within the UK for aircraft to divert”.

“Aircraft were then going to Europe, and then some were even halfway across Europe and going back to base in India,” he said.

“So, quite a level of disruption for those passengers, let alone all of the cancellations”.

When asked why the airport had not reopened sooner, Mr Woldbye said that could have meant passengers got hurt.

He stated that if they had got the situation, tables would have turned about why people got injured.

According to him, it would have been a much more serious discussion.

“So there is a margin within which our people have to take very serious safety decisions, and that is what they are trained for, that is what they do, and that requires that every single system is up and running, tested and safe.”

However, Mr Wicking said Terminal 5 could have reopened sooner.

He said:

“In terms of T5, my understanding both from British Airways but also on the day, was that pretty much everything was fine to operate by mid-morning, by 10 o’clock.”

FRIDAY, MARCH 21, 2025

Mr Woldbye said Heathrow realised “during the early hours” of Friday March 21 that they were losing power to the airport.

“In our operations centre you would seen all the red lights go, that the systems were powering down,” he said.

“We had no information as to why.”

“We then had a slightly later stage call from the fire department that the substation was on fire,” he said.

Heathrow is supplied by three substations, but knocking out one caused the airport to shut down.

Mr Woldbye said a third of the airport was powering down and that Terminal 2 was particularly affected, along with certain central systems.

He added that it became “first and foremost a safety situation”.

“We need to make sure, when a crisis happens, that people are safe,” he said.

The first priority was to check that no-one been caught in lifts or was hurt.

Safety critical systems such as runway, runway lighting and the control tower “switched in as they should”, however, he said.

The government has backed plans for Heathrow to build a third runway as part of efforts to boost UK economic growth.

The airport would need double the amount of power for its expansion plans, Mr Woldbye said.

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