I may be wrong and it is a while ago now but I recall that the Tristars had an internal baggage loading belt that could be deployed at destinations that were not prepared for such a large aircraft at the time?
I also remember that initially the turning circles at each end of Luton's runway were only about 50 m across so our Borough Engineers invented a row of pegs set in the grass so the crew knew when to make the turn, the cockpit being over the grass when the turn was made.
Fond memories of controlling two Tristars training in the visual circuit....
JB