Andy McNab, the author of the book this movie is based on, is a former member of British SAS. He was captured and tortured by Iraqi forces in the first Gulf War, he was the commander of an eight-man patrol call sign Bravo Two Zero. Sean Bean played him in a film version of that book.
Andy McNab, the author, has also helped choreograph the weapons and tactics for Miami Vice (2006), Collateral (2004), and Heat (1995) (all of which are Michael Mann movies). He has also assisted in lending special forces technical advice to military computer games.
SAS: Red Notice (2021) was re-titled "SAS: Rise of the Black Swan" on Netflix to avoid confusion with the Netflix-produced film Red Notice (2021), starring The Rock, which was also released in 2021.
SAS: Red Notice (2021) is based on the novel of the same name by Andy McNab who is a former SAS Sergeant, highly decorated, served during the Iraqi Gulf War, and currently is the director of a Hereford-based security company. McNabb is a pseudonym and he rarely is seen on camera.
Four main actors in this movie have had appearances in the Marvel and/or DC Universe. From the DC Universe, Ruby Rose starred in the TV Series Batwoman (2019) as the titular character Kate Kane/Batwoman, while Tom Wilkinson starred as Gotham crime boss Carmine Falcone in Batman Begins (2005). From the Marvel Universe, Hannah John-Kamen starred as the main villain Ghost in Ant-Man and the Wasp (2018) while Andy Serkis, who actually appears in both universes, starred as the mercenary Ulysses Klaue in Marvel's Avengers: Age of Ultron (2015) and Black Panther (2018), and will also play Bruce Wayne's butler Alfred J. Pennyworth in The Batman (2022). Sam Heughan voiced Mirror Master in the video game Lego DC super villains.