West Yorkshire Police used to have a Land Rover attached to a wheeled frame. It was connected to the front of the Landy, and I never saw it disconnected. Routine procedure was to reverse the Landy out of the big shed, onto the concrete. Apply the handbrake and go flying.
The landing, with blades going over the cab of the landy, struck me as looking for trouble when I first saw it done. In practice it worked a treat.
It did make the end of day / foul wx chores real easy. Just drive into the shed, pushing the whole thing away.