If your Range Rover is beeping twice when you lock it, there are a few possible explanations. First, it could be that your alarm system is activated and the second beep is simply to confirm that the doors are locked and the alarm is set. Alternately, if you have an anti-theft system installed on your vehicle, the double-beep may indicate that the system is armed and active. Finally, it's also possible that there's a problem with one of the sensors in your car's door locks, which could cause the system to malfunction and emit a double-beep sound when you lock the doors. If you're unsure of what might be causing your car to make this noise, it's best to consult with a qualified mechanic or dealership service department for further diagnosis.