At London Heathrow in 2026, travelers should expect a highly digital and high-security environment. The airport has successfully rolled out next-generation CT scanners in all terminals (T2, T3, T4, T5), meaning you can now keep your liquids (up to 2 litres) and electronics inside your bags during security. However, the airport is sprawling; expect significant walking times—sometimes 15 to 20 minutes—between gates, especially in the satellite buildings of T5. If transiting, you must follow the purple "Flight Connections" signs; while most transits are "airside," moving between terminals requires a ride on the free Heathrow Express or Elizabeth Line. You will find world-class shopping and dining, but prices are "London-premium." For 2026 passengers, the "Heathrow App" is vital for real-time gate notifications, as the airport is a "silent terminal" and announcements are kept to a minimum to reduce noise pollution.