But weapon discipline should have been hammered home long before he ever deployed
Couldn't agree more. Some people just can't learn though. With the benefit of hindsight, this man should never have been accepted into the armed forces, or at least he should have been discharged earlier. He's not the only one who needs to learn, I suspect others made mistakes too in this case.
Despite his horrific injuries, Johnson was initially reluctant to report the incident fearing Army colleagues would ridicule the RAF.
He believed the cock-up would make the RAF look like "t***s" because, in his own words, "The Army would love to hear we shot one of our own lads.