Gatwick’s long-running expansion case has moved decisively in the airport’s favour. The Court of Appeal dismissed a legal challenge to the project, and the Department for Transport said the ruling means the airport’s second runway can now be brought into full use, drawing a line under years of planning uncertainty. For investors, contractors and employers across the South East, that matters because large infrastructure schemes rarely create much confidence while they are still tied up in court. This decision does not put aircraft in the air overnight, but it does move the story from legal risk to delivery, which is a more practical question for businesses weighing recruitment, procurement and future demand.

The government’s economic case is clear enough. Department for Transport-backed figures say the expansion could create 14,000 jobs across the region and add £1 billion in economic benefits each year, with the effects spreading beyond Gatwick itself through the airport’s wider national supply chain. That is the point likely to matter most to many Market Pulse UK readers. Airport growth is not only about airlines and terminals. It tends to feed into construction, engineering, catering, maintenance, logistics, retail and local hospitality. For SME owners in particular, the real test will be how quickly those projected gains turn into contracts, vacancies and higher day-to-day trade.

Passengers are central to the political case for the project. Ministers say first flights from the extended Northern Runway could begin from 2030, opening the way for 100,000 additional flights each year on top of the 200-plus destinations Gatwick already serves. Transport Secretary Heidi Alexander also said the scheme could support around 13 million more passengers. In practical terms, more runway capacity gives airlines more room to add routes and frequency. The government argues that stronger competition should help put downward pressure on fares and widen choice for holidaymakers and business travellers. That will not mean cheaper tickets on every route in every season, but a less constrained airport does usually give consumers a stronger hand than a full one.

There is also a wider investment signal in the ruling. A court-backed green light for Gatwick gives ministers a live example of how they want to connect transport capacity, regional growth and the UK’s pitch to international investors. Direct air links still matter for tourism, inward investment and sectors that depend on fast business travel or time-sensitive freight. Even so, expansion stories are rarely one-directional. Local workers may see fresh opportunities and nearby firms may benefit from new demand, while residents and campaigners will continue to focus on disruption, traffic and the effect of more aircraft movements on surrounding communities. That tension sits at the centre of almost every major UK infrastructure project, and Gatwick is no exception.

Ministers are clearly aware that any support for airport growth now has to come with a climate answer. The Department for Transport said any aviation expansion project, including a possible third runway at Heathrow, must meet strict conditions on air quality, carbon emissions and noise. The government also pointed to recent funding commitments designed to make that case more credible, including £219 million to support sustainable aviation fuel production in the UK and £43 million for hydrogen-powered and electric flight. Those sums do not close the wider debate around aviation emissions, but they show how ministers want to frame the next phase: more capacity, with cleaner technology expected to do more of the heavy lifting over time.

The legal position is now firmer than it was before the judgment. The Court of Appeal not only dismissed the challenge but also refused the campaign group permission to appeal, removing another obvious source of delay and giving Gatwick a clearer path towards construction and operational planning. What matters next is less dramatic but more commercially important. Between now and 2030, attention will turn to execution, planning conditions, supply-chain readiness and whether the promised benefits show up in fares, routes, jobs and regional activity. For Gatwick, this is a milestone. For the South East economy, it is a live test of whether a big transport scheme can deliver the kind of broad-based gains ministers are promising.