Long Final
I'm not sure that having your pub closed on a legal technicallity such as this would give you a "criminal record" or count as a "conviction", but then again I'm not a lawyer so perhaps the citizens advice bureau can help you out.
Assuming the worst and the best - you have to close your pub but you are offered employment in the airline industry, just be honest with any prospective employer, if at any time you're asked to reveal if you have a criminal record, tell them what happened.
As long as you promise not to have sub woofers, bass boomers and the like on the flight deck I'm sure that they'll be OK with it.
What will go against you is if you fail to reveal anything when asked to do so.
Best of luck anyway.