Hi Brendan,
It may not be the same LR . There was a vehicle at Vehicle Training Wing ALTC used as a training aid. This vehicle was a chocolate brown, had a tray back and looked like a farm vehicle.
The story was the vehicle was taken by a soldier who worked in the vehicle pool at 51 Suppy Battalion. His digger took the vehicle home to his father who then used it on the farm. Later there was a army exercise around the farms location , a neighbour , talking to a officer on the exercise asked if there was any chance that he could have a Rover and explained the story about the LR his neighbour got from his son in the army. The officer explained "it doesn't quite work that way" and investigated.
The vehicle was retrieved by the army , the soldier was charged , and the ended up at ALTC as a training aid for the trainee spanners. Going by your photo , I don't think it's the same car???
Something to investigate I suppose 😊👍