Waxy, Max is a policeman, not an airline recruiting expert. While his advice was no doubt given in good faith, it is essentially incorrect. Please read the thread I linked to in an earlier post here for a full explanation of the procedure for the checking of criminal records by airlines and by the BAA, and information about what level of disclosure is required. You will find all the answers you need. If you are unsure about anything having read that thread, please come back to me.
Scroggs