Hi Colin
Good spot. Yes, it is a numeral rather than a letter.
Notably, that same Wiki page suggests, by comparison (IE 1947), that my plate may be a numeral prefix vice a letter.<idea>
I have to watch that video a little closer later tonite.....8CH NCOs, RCD Officer(?), FF Worthington and LGen Fleury's medals.....
*edit* So I did watch the rest. Very good. He was an RCD Offr. Area & Armd/Sqn Tac Signs on the wheeled vehs and the Shermans. A convenient "43" in front of one of the veh #. There must has been a shortage of canvas makers (Mat Techs?) at the time or that Sherman was going into or just out of storage of some sort!
And it brings a tear to see Export A Plain as the smoke of choice for those old Blackhats. Sniff.
regards
Darrell