MP
I doubt it will affect your chances for an Airline job. Firstly in a couple of major airline application forms it has a question about accidents. It has nothing about prosecutions. You can therefore fill the form honestly. If it does come up then be as honest in the interview as you have been on here. Most interviewers (trust me I know) will use what you say to give a big picture of yourself, and if your good enough you will pass.
The biggest question this raises is that should the 2 yearly flight be a little bit more formalised?
Good luck and come back to Waltham for a beer.
regards
Wide