<h1>Passenger fails to board after boarding pass scanned; flight returns to gate to offload baggage and secure departure</h1> A Delhi-bound aircraft returned to the departure gate at London Heathrow shortly after pushback when a passenger whose boarding pass had been scanned and who was marked as boarded failed to board and went to the arrivals area. Crew followed security protocols: the aircraft returned to offload the passenger's baggage, the passenger was detained by airport security for questioning, and the flight departed after a delay. The carrier said the decision ensured compliance with security regulations.