Cavalry regiment QOH as was, S/Sgt wore brown shoes and addressed as sergeant major.WO2s don't wear brown gloves.
It's an occifer thing, along with brown shoes and cloth capbadges. That for some reason or another has be usurped by WO1s, along with them buying a set of mess dress on the off chance they'll commish (and receive the moneys for it) or just wear for their last few years.
I had great fun on my Drill Course when a gunner stripey turned up on the course with a set of brown shoes he'd been leant by a WO at his regiment. (29 Cdo btw). Don't get me wrong they were very highly polished...
... and a beret or regimental equiv. Thinking of the usual Remembrance Day march past on Whitehall, servicemen & women wear uniforms and civvies/ex service persons wear civvies head dress and medals if appropriate. Even the ex officers wear civvies, bowler & brolly and medals.That still doesnt explain why you were wearing a uniform, other people manage with a blazer.