No 5 Mess Dress (No 5 SD) – Male Officers, Warrant Officers and SNCOs
0231. Occasions for Wear.
It is reserved in the main as an evening or mess dress and is worn by commissioned officers, WOs and SNCOs at formal evening functions e.g. dining-in nights and guest nights. It may also be worn by retired officers, WOs and SNCOs and additionally, officers serving in the FTRS, RAFRO class CC, RAuxAF and RAFVR (T) on all occasions when this form of dress is appropriate for serving personnel.
Post retirement I used to wear my No 5s for the above type functions, until I was forced to retire it through a small sizing issue
and now wear an evening suit.