Guys thank you for all the feedback. If it is just a basic DBS then I do not have to worry as this will not show up as this is a 'spent' conviction. If it was 'unspent' then this would be something I would be required to declare under the Rehabilitation offenders Act 1974. That being said, if I apply for airlines and they ask for 'spent' conviction then this is a completely different matter. I have done a lot of research for major airlines in UK and the entry requirement for someone that has criminal history have been directed to UK CAA website, referring to CAP 2159. "
Applicants will fail the criminal records check if it reveals an unspent conviction for a disqualifying offence. Under the Rehabilitation of Offenders Act 1974".