Dont you need planning approval for hardstandings?
I cant imagine it anything to do with helicopters or a patio for an estate dinner party
I reckon if it was to be a hardstanding they could easily leveled it. Just about anyone is capable of that task.
I would go with some university project or some experiment on peatbog life. Each slab could give equal sized control areas that could be lifted individualy for different time periods. They have the weight to prevent them moving easily in wind etc
Just having a guess and a cue for me to switch off the pc and get on.