What action must a driver take if they suspect their vehicle carrying Class 1 explosives is being followed or targeted for hijacking?

1. Pull over to the hard shoulder and hand the keys to the tailing vehicle
2. Get out of the cab and engage in a physical fight on the motorway
3. Do NOT stop; immediately contact emergency services (999) and carrier control room, report position, and drive to a safe designated secure location
4. Turn off all vehicle lights while driving at night