Close mate of my mate growing up, down your way BM, Rochester exactly.
Well he came out of the pub blitzed and got into his white Ford Taurus and drove home. Puts the car in the garage and goes to bed.
2.30am - awakes to the banging on the door. Puts a robe on and goes down stairs and there are the local Rochester rozzers.
"What have you done with our car, sir?"
"What the hell are you talking about? I came home in mine."
"You have taken our car, Sir."
"Taken a police car, you are off your rockers. I came home in my Ford Taurus."
"Could we have a look in your garage, Sir?"
Imagine his face when he sees a vehicle from the Kent County Constabulary standing there........
They couldn't do him for drinking and driving as it had been far too long - and there was no follow-up as the policemen would have had some explaining to why they had left the car open and the key in it.......But driving a car home with all the extra police kit in it and not noticing - serious arseholed, I would say.