Richard and Hanno thanks for the correction. I'm not at all well versed in Commonwealth vehicles, but that's where my interests lay so I'm learning.
lynx42 here's a website with a bunch more of those tokens:
https://sites.google.com/site/malstokens/naafi
dcrfan, that's an interesting photo. Although I've read about it in several locations I haven't seen many photos of standard issue cargo trucks being used as canteens by the welfare services. The other I can think of is also YMCA in fact.
Matt