The UK is pushing forward with ambitious expansion plans for Heathrow and Gatwick airports, valued at more than £50 billion. Gatwick will repurpose its Northern Runway to raise capacity to 75 million passengers, while Heathrow’s long-awaited third runway could expand annual traffic to 150 million. Supporters say this will drive competition and lower ticket prices, while critics warn of increased pollution and disruption. The projects mark a defining moment for UK aviation’s future.