A major security incident triggered a lockdown at London's Heathrow Airport on Sunday morning, with armed police units rushing to the scene and passengers facing severe travel disruption.
Armed Response and Terminal 3 Lockdown
Armed officers from the Metropolitan Police were deployed to Heathrow Airport's Terminal 3 shortly before 09:15 on 7 December 2025. The nature of the incident has not been officially disclosed, but the response was immediate and significant. The area around the terminal's short-stay car park entrance was swiftly cordoned off by authorities.
Emergency services, including firearms units, ambulance crews, and fire engines, are confirmed to be in attendance. A major backlog of vehicles quickly formed, with cars unable to either leave the vicinity or enter the drop-off zone.
Major Travel Disruption Across the Airport
The lockdown and police operation caused widespread travel chaos. Key transport links serving the airport were suspended as a precaution. The Heathrow tunnels were closed, and London Underground (LUL) services on the Piccadilly Line, along with Elizabeth Line services to and from the airport, were halted.
Drivers of buses trapped inside the station were given specific instructions by authorities. They were advised not to leave their vehicles under any circumstances. The bus routes affected include the 105, 111, 278, 285, SL9, A10, SL7, and U3.
Passenger Advice and Ongoing Situation
Passengers and those meeting travellers were urged to avoid the area around Terminal 3 and to check with their airlines for the latest flight information. The broader airport remained operational, but access to specific zones was severely restricted.
The incident at one of the world's busiest international airports underscores the high level of security preparedness in place. As of the latest updates, the situation is ongoing, with police remaining on the scene and investigations continuing. Authorities are expected to provide further details on the cause of the lockdown once the immediate incident is resolved.
