During the construction of Heathrow Airport, Northolt was used for commercial civil flights, becoming the busiest airport in Europe for a time and a major base for British European Airways. More recently the station has become the hub of British military flying operations in the London area. Northolt has been extensively redeveloped since 2006 to accommodate these changes, becoming home to the British Forces Post Office, which moved to a newly constructed headquarters and sorting office on the site.