With great respect BATCO, I disagree. There was a thread here some time ago that illustrated the last time the RAF tried something "more distinguished" between the wars. The full dress uniform looked like something out of a Marx Brothers comedy. Much better to retain the continuity of the same uniform, as occasionally modified over the years. That after all is what our sister Services do, and thus retain their immediate recognition by the GBP.
Union Jack:-
...whoever took the trouble to film and post this excellent record of the occasion
An excellent and prolific purveyor of London ceremonial, troopingadmin can be subscribed to here:-
https://www.youtube.com/channel/UCtD...hWzM8u6Hr8HVvw