I cant do anything but laugh at that! Same thing happened to me with my lockup in glasgow. Gave the person 24 hrs to move the car from infront of the lock up. No joy. Called the police and was told there was nothing they could do apart from issue it a ticket which they did, but that didnt solve the problem that i couldnt get my car out!!
Decided to take things into my own hands, borrowed my mates range rover and towed it out the way of the lock-up door leaving it parked in the middle of the road blocking the one way street. Needless to say it was removed shortly after that on the back of a recover truck hahaha!