I think the SNCO's will come under the "Other Ranks".
Shame there are "Seperate" do's on the Friday - I hope those ex-"Other Ranks" from National Service Days who then left to become Mayors/Councillors/Business Owners etc are treated well, unlike another Sqn anniversary bash I know of a few years ago when they were herded into the NAAFI for a few mouldy pork pies and some very loud music. One felt so strongly he dragged the Sqn Cdr out of the concurrent but very seperate OM Dinner to ask him if he was having a good time, then told him exactly why he wasn't!
Cost the Sqn a lot in terms of reputation and money, as they were all refunded. A lot of ex-members also requested their details be removed as they wanted to sever links after the fiasco.
I sincerely hope all 25 Sqn members, past and present have an excellent weekend.