Heathrow, Gatwick, Manchester and Stansted were among the airports affected. Flights are moving again, but that does not mean the disruption disappears with them.

Aircraft and crews need to get back into position. Airlines need to rebuild schedules. And cargo that did not move as planned still needs to find its way onto another flight.

For passengers, that means delays and cancelled plans.

For businesses, there is another side to the story.

Cargo.‍

Air freight is often used because time matters. Medicines, electronics, manufacturing components, retail stock and other high-value goods move by air because waiting several extra days is not always an option.

And much of that cargo is closer to passenger travel than businesses might think.

Around 95% of Heathrow’s air cargo travels in the belly hold of passenger aircraft. (2) When those flights are cancelled, the impact does not necessarily stop at the departure gate. The capacity businesses were relying on can disappear with them.

The numbers show the scale of what is moving.

Heathrow handled £293 billion worth of goods in 2025, more than a quarter of all UK trade by value. On an average flight, around £600,000 worth of cargo is travelling alongside the passengers. (3)

So, when part of the aviation network stops, there can be a much wider commercial effect.

And importantly, that effect can last longer than the original disruption.

A cancelled flight does not mean the cargo disappears. It still needs to move. Shipments can be rebooked onto later flights or moved through alternative routes, but there is only so much available capacity.

At the same time, new freight continues entering the network.

That is how a few hours of disruption can create a backlog that takes much longer to clear.

For businesses with air freight moving through the UK, that means some shipment delays should be expected while the network recovers. A flight operating normally today does not automatically mean every shipment affected yesterday will immediately be back on schedule.

That matters because the delay itself is often only the start of the problem.

A manufacturing line may be waiting for a component. Stock may be tied to a launch date. A customer may already have been promised a delivery. A missed arrival can then affect customs clearance, collections, warehouse planning and onward transport.

The earlier a business knows that, the more options it has.

If you have time-sensitive air freight moving now, this is the point to identify which shipments matter most, check whether bookings and expected arrival times have changed and build some contingency into delivery plans.

It is also worth keeping the people further down the supply chain informed. A revised ETA communicated early is much easier to manage than a missed deadline discovered at the last minute.

This is where disruption exposes something important about supply chains.

A logistics plan built around everything going as expected is not much of a plan.

Businesses cannot control an air traffic control failure. They cannot stop bad weather, airport closures or an airline cancelling a flight.

What they can control is how quickly they know there is a problem and what happens next.

Sometimes waiting for the next available flight will be the right decision. Sometimes another carrier, airport or route may make more sense. For particularly urgent movements, a completely different solution may be needed.

There is no single answer because not every shipment carries the same risk.

What matters is having visibility early enough to make the decision.

At Blaiklock, our operations teams monitor airline schedules and changes in available capacity so customers can be made aware of disruption as early as possible. Where a shipment is affected, we can assess alternative routing options and provide updated transit expectations to help businesses decide what to do next.

The current disruption will pass. Flights will return to schedule and the backlog will clear.

The bigger question for businesses is what happens when the next disruption arrives.

Because resilience is not about predicting every problem.

It is about staying in control when the plan changes.

Your logistics partner cannot stop UK airspace from closing.

They should know what to do when it does.
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Sources

1. Reuters — 8–9 September 2026: Reporting on the NATS technical failure, widespread UK flight cancellations and the continuing knock-on disruption.

2. Heathrow — Sustainable Growth & Global Connectivity: Heathrow states that approximately 95% of its air cargo travels in the belly hold of passenger aircraft.

3. Heathrow — UK Trade Data, April 2026: Heathrow handled £293 billion of goods in 2025, with an average flight carrying around £600,000 worth of cargo.

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