Speculation that anybody else from the course was using the M25.
How long do you factor in for a delay? If your journey time is for example 30 mins and you leave home 20 mins before that ? An hour earlier?
Or do you stay in a bunk house outside the crew training block during training?
I think this was more to do with
"We don't care why you were late, we are in charge, do as your told........or else"
I am very glad I don't work in an environment where the staff are treated like this.