According to the Internet source given below, 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 currently based at Leuchars Station, as part of the Scottish 51st Infantry Brigade.
The regiment has its own Pipes and Drums, who were first formed in 1946 and tour widely, performing in competitions, concerts and parades. Their most famous piece is Amazing Grace, which reached number one in the charts in the United Kingdom, Ireland, Australia, New Zealand, Canada and South Africa in 1972.

Websites:
	Royal Scots Dragoon Guards	Biography by wikipedia.org.