It is quit obvious that the makers of this film have not read the book by Andy McNab.
There is a good start with background setting the scene then it goes completly off kilter. Tom's girlfriend is not a Doctor, the trip to France through the tunnel is not all lovey dovey and to cap it all the male protagonist is not shot in his house by the SAS. He escapes and causes mahem and chaos on the train. Disappointed and only managed to hold out for 10 minutes. I know there is dramatic licence and some things get changed but this film does not follow the story that i read about.