The episode was filmed at RAF Strike Command in High Wycombe, with all concerned giving up their time for free for the one-day shoot.
"It was great fun and after we finished filming they laid on a buffet for us" recalled John Sullivan in the book Only Fools and Horses – The Official Inside Story.
Shot in the style of a home movie, the episode sees Del Boy (with a folder marked "Top Secret" under his arm), Rodney and Uncle Albert addressing the troops from a "secret location in Southern England" (shortly revealed by Rodney to be High Wycombe).
Their yellow Reliant Regal van has been kitted out with a Union Jack, camouflage and a machine gun and Del suggests that it can be the alliance's secret weapon.
Also present are many of the troops' wives, whom Del and Rodney assure the viewers they will take care of.