Looking for some 15mm horse mounted/dismounted troops to use as the Queens Gaurd. Dressed for parade...dont jump on me if I didn't use all the right lingo or verbage, you know what I mean...
Ah... you thought you were on 'that other forum' clearly...
When you say 'Queens Guard', we have a couple of types of those.
The mounted ones (Lifeguards/Blues and Royals) in helmet and breastplates, might be available in a Victorian range somewhere, the uniforms haven't changed much, or with some work on the helmet, French Napoleonic Cuirassier might do the job in 15mm.
The Bearskin wearing Foot Guards are probably a little harder to source... but when a 'Line' unit is mounting guard, which sometimes happens, they wear the 'Home Service Helmet', which again might be available in a Victorian range too. The biggest difference will be the weapons if you are looking at present day, as they all carry the SA80, which is quite distinctive, even in 15mm.
Sorry I can't be more helpful, but I'm sure somebody here will come up with a better answer.