Sharpie
The Air Steward and the later Cabin Crew badge is nothing like RAF Pilot Flying Badges - a LOT smaller, the wings are a different shape, it has the monogram ‘AS’ or ‘CC’ and they are worn on the sleeve (or they should be). It is only weak leadership on the shiney 10 (ie. your old fleet), Tristar, 125, 146 and now Voyager that has allowed them to, outside of the AP1358 Dress Regs, wear them on their left breast of their FACS, flying suits or cold weather jackets. It is a Trade badge and should be worn on the right sleeve like the picture that Nutty kindly shared.
This picture from eBay gives you an idea of the tiny size of the badge.
