Well I have just gotten home from the hospital and some scrote in their KA has decided to block my drive with their car

Walked round all the houses in the road and nobody owns up to having the car. Except one lad absolutely bricked himself when he answered the door and I asked if he had a KA (I think its his but he won't be going anywhere). Well whoever it is isn't getting away this time, this isn't the first time they have done it. So quite simply i've blocked the bugger in with my car, leaving them a note to knock when they would like to move.
My dad keeps saying to leave it and park somewhere else. Sorry but no, surely what i'm doing is not unreasonable when there are other places to park in the road?