Hi Banana Peel,
I am in the same boat as you, having a spent conviction from 10 years back.
I am considering how I should answer the question of if you have "ever" been convicted of an offense.
The basic disclosure is clean, but do you still need to answer yes and disclose it to the airline? it would be much appreciated if you can share your experience in this matter.
Would it be worth it to call them directly and ask I wonder...
Thank you for your time and consideration.
Cheers