Thanks for following up Herod. I'm relieved that it confirmed a wireframe as the basis for the Super VC10 - that explained a lot! If they'd just left off the FR probe and not done that final "Instagram wash"...
Incidentally there is a slightly later scene in the same opening sequence that features the two new arrivals at the top of the aircraft steps by the front door. I wonder if it's a real aircraft door (but presumably not a VC10 if they shot it all in South Africa) or some more CGI?