Though it's for dramatic purposes this is a poor representation of the SAS. I watched it once and never again. I feel some ex soldiers would not have been impressed of the film too. The only factual parts of the films is the real news footage. Poor film and very badly made.
One more note the film seems to portray the soldiers has unintelligent. I believe every SAS soldier has a high IQ. They're thinking soldiers. Plus the film shows only a handful of soldiers. Red Team and Blue Team consisted of 30 soldiers each team simultaneously storming the building when the order came in to commence the rescue operation.