Ryanair, Europe’s leading low-cost airline, has called for the CEO of the UK’s National Air Traffic Services (NATS), Martin Rolfe, to resign immediately after almost 12,000 Ryanair passengers travelling to and from London-Stansted Airport (STN) on May 31, 2025, were made to suffer what the airline described as unnecessary delays of up to 50 minutes due to staff shortages among NATS-employed air traffic controllers. While Ryanair has long campaigned for reform to ensure air traffic control centres are fully staffed to handle the forecast flows of air traffic volumes, the airline says that air traffic control (ATC) delays are getting worse, “as evidenced by the delays to and from London Stansted due to NATS staff shortages.”