In 2011, the line was extended to Terminal 5C and APM fleet was initially expanded to nine then later to ten vehicles.

[3][2][4] The Heathrow Terminal 5 APM vehicles run in a dual-lane tunnel totalling 0.67 kilometres (0.42 miles) in length.

[5] The people movers operate exclusively "airside", meaning that the system can only be accessed by passengers who have first passed through airport security.

[3][2][6] A completely separate personal rapid transit system, the London Heathrow Terminal 5 PRT, operates "landside" between the car parks and Terminal 5.

[7] The transit system is run with a small fleet of ten Bombardier Innovia APM 200 vehicles which convey over 6,500 passengers per hour in each direction.