There's squatters rights. But that has effectively been destroyed so I wouldn't spend too much time looking into it. You may have been thinking of an implied easement.
Probably easier to set up a company with someone else registered as director, then have them approach him to buy it.
Park car in his space, build a wall around it, leave it for 40 years then argue squatters rights. I'm sure we'd all chip in to fund the bricks to get things going.
There's squatters rights. But that has effectively been destroyed so I wouldn't spend too much time looking into it. You may have been thinking of an implied easement.
Probably easier to set up a company with someone else registered as director, then have them approach him to buy it.