Ok, if its not immobilised and you have a new car battery and its cranking ok, and the fob is knackered - from the Land Rover handbook;
Emergency Key Access (EKA) In the event of a remote control failure follow the procedure to enter the four digit code. This will disarm the alarm system and re-mobilise the engine.
Emergency Key Access (EKA) In the event of a remote control failure follow the procedure to enter the four digit code. This will disarm the alarm system and re-mobilise the engine.