Mystery RAF vehicle marking in MV Chatter Posted November 10, 2013 Thanks for your comments. The load on the Queen Mary is a Spitfire. Ted, I think that you might be on the right track with your explanation. It could well be that this was how 49MU chose to display their fleet numbers and as they were responsible for Aircraft Salvage across the South of England during this period of hostilities they would've had a large fleet to be able to cope with the demand. Ian.