I think their import office is at Bristol, something like that, which meant the cars had to go there first anyway before going to the dealers.
But you may be lucky.
I've got no idea how they operate but if a shift is 8 hours and 5 men that seems quite a good number to me. That'd be about 10 per man hour to drive it off the boat to the parking lot and get back to the next one. In fact looking at it the other way I imagine each car takes maybe 20 minutes to drive off, deliver, do paperwork and get back for the next one. I doubt they'd have a huge pool of drivers as there would be vast amounts of time between ships to pay them for.