Timed override means you can bypass the engine immobiliser/key reader in an emergency by leaving the ignition key to the ON position for 45 minutes on series 1 VS models and 120 minutes on series 2 VS models. Models like VP and early VR's had a key override switch in the front passenger door jamb to bypass the security/immobiliser, and this was changed to a timed bypass setup on later model VR's.