When the movie's grand action sequence, the storming of the embassy by SAS troopers, to be played by movie stuntmen, was about to be filmed, the real-life SAS soldiers offered to do the sequence for the production, not requiring the use of stuntmen. For director Ian Sharp, it was an offer he simply couldn't refuse, as this level of authenticity couldn't be achieved by acting stuntmen, no matter how well trained.
A sequel was planned where Captain Skellen would lead an SAS team into the Falklands Island in a secret mission as part of the Falklands War but the movie never eventuated.
At least one of the stunt team, Terry Forrestal, was a former member of the SAS; Tip Tipping was a former Royal Marine. Sadly he died in a parachuting accident for a BBC series. He also played a colonial marine in Aliens: Die Rückkehr (1986), but was 'killed off' early in the film.
The picture is considered to be very special within the S.A.S. and the special forces community as the film is "their movie."
SAS regimental soldiers assisted the production on-set whilst filming in Hereford, England. Actors playing SAS soldiers were trained by a real SAS officer. Actor Lewis Collins didn't really require any training according to director Ian Sharp who has said that the SAS trainer was very impressed with Collins' skill level. During pre-production, SAS commanding officer Peter De La Billiere originally refused to assist the production but later relented.