5th cavalry regiments - There was always a 5th Dragoon Guards, Princess Charlotte of Wales' Dragoon Guards, later the Royal Inniskilling Dragoon Guards.

The 5th light cavalry regiment I seem to remember was an Irish regiment that was disbanded for mutiny or something before the Napoleonic Wars but after the Wars another regiment was formed -the Royal Irish Lancers. It was this regiment which was combined in 1922 with the 16th Queen's Lancers (previously the 16th (Queen's) Light Dragoons to form the 16th/5th Lancers. Maybe the order of precedence was something to do with the fact the 'Irish' part was less relevant to the Crown in 1922.

And yes BPL - three arms in our flag; St George, St Andrew and St Patrick. Just don't get me going about the 'couterchange of saltires'.

Les