The location where the attache case containing the money was lifted, was the West London Air Terminal in Cromwell Road. It was established by British Airways, and associated airlines used it. You could check in there and then be bussed to Heathrow. The checking in was discontinued some years before this episode was filmed, and it had become in effect a bus terminal for the ride to Heathrow, but for the sake of the story, checking-in was shown in the action.
The following actors from this episode previously appeared with Dennis Waterman in The Sweeney (1975). David Jackson (Big Stan) appeared in Contact Breaker (1975). Peter Childs (Rycott) appeared in Night Out (1975) and Sweeney! (1977). And George Tovey (Pub Landlord) appeared in Loving Arms (1976)
Hans Meyer (Maurice Bonnet) later appeared in Minder on the Orient Express (1985) as Kurt Wengler. And David Jackson (Big Stan) later appeared in Give Us This Day Arthur Daley's Bread (1985) as Marion and in Three Cons Make a Mountain (1991) as Mr Fletcher.