The Scottish and North Irish Yeomanry (SNIY) is a reserve light cavalry regiment created in 2014 as part of the restructuring of the British Army's Army Reserve. It is operationally paired with the Royal Scots Dragoon Guards, based at Leuchars Station in Fife, Scotland. The regiment has numerous squadrons across Scotland and Northern Ireland.

The Royal Scots Dragoon Guards (Carabiniers and Greys) is a cavalry regiment of the British Army, and the senior Scottish regiment. The regiment, through the Royal Scots Greys, is the oldest surviving Cavalry Regiment of the Line in the British Army. The regiment is based at Waterloo Lines, Leuchars Station, as part of 51st Infantry Brigade and Headquarters Scotland, a light adaptable force brigade.