854-654-855, Lampton Park allotments, Hounslow - Train 227, 0641 Osterley to Heathrow Terminal 4 (0636 ex Northfields Depot)
Piccadilly Line service. It is passing the gantry that has three glass hoops to prevent full size trains reaching the tube sized tunnels at
Hounslow West. If a full sized train were to pass, it would smash the hoops, which would break a circuit and throw the next signal to red.
Date: 3 June 2018
Manipulation Notes: None
Camera mounted on a tall pole and remotely fired