I was on the same RAF squadron as this guy. He was an arrogant, cocky, self obsessed individual, he thought the world revolved around him.
When this came to light it did not surprise me at all based on what I know of him.
Agree with the comments above that his sentence is not long enough, however, in reality his personal sentence will be longer. Loss of job, loss of military pension, loss of wife, loss of credibility, his name forever searchable on Google - what a fool.