How will UKADS redesign the UK’s busiest airspace?

The UK’s airspace structure probably isn’t something most people think about every day. Yet thousands of flights rely on this complex network of invisible routes in the sky. From commercial and cargo flights to military aircraft, the UK’s skies must operate safely and efficiently around the clock.

As aviation demands grow, parts of the UK’s airspace are operating beyond what they were designed to accommodate. With some airspace routes dating back to the 1950s, airspace modernisation is increasingly important. The UK Airspace Design Service (UKADS) has been established to help deliver that change.

A new licence

In May 2026, the Department of Transport (DfT) changed NATS’ licence. The new licence enables the delivery of UKADS, providing the policy and regulatory basis for work to begin.

A key change under UKADS is the move towards a coordinated, system-wide approach to airspace design in the London area, rather than individual airports progressing separate Airspace Change Proposals (ACP) which can create interdependencies and contribute to delay. This is particularly important in London and the South East, where 11 major airports operate within a relatively small and highly complex area of airspace.

Much of the wider policy and regulatory framework is not yet finalised by the Civil Aviation Authority (CAA) and DfT, but the licence change meant that UKADS transitioned from a concept to a functioning service. Despite being in its early stages, we now have some of the structure in place to support future airspace design.

Why is UKADS starting with London?

Much of London’s airspace has operated with the same underlying route structure for decades. UK traffic has grown, and is expected to continue growing, which is why a new and improved route infrastructure is so important.

London is home to one of the most complex areas of airspace in the world. With 11 airports across the Terminal Control Area (TMA), there is a high concentration of traffic and complexity. Due to how connected this TMA is, even small changes in one area can have implications elsewhere in the network. Rather than airports progressing their own individual ACPs, largely in isolation, UKADS can consider the airspace as a connected system. The co-ordinated approach will develop designs for a single ACP that will work more effectively across the wider London network.

The green lines are departures and red are arrivals.

Looking ahead

Modernising airspace isn’t easy. It’s a considered approach, balancing safety, operational performance, environmental impact, and the needs of the many stakeholders across the London TMA.

One of UKADS’ first priorities is to engage with the airports involved, which is already under way. The team is working with them to bring together their existing ACPs and supporting data, giving UKADS design experts the information they need to begin understanding how a coordinated operational design might work.

In our latest episode of Specialist Spotlight, we spoke with Head of UKADS Airspace Change, Gareth Ellis. Watch the video below to find out more about his role and how UKADS will support the modernisation of one of the world’s most complex areas of airspace.