Garry Owen, one of my all time favorates.
Money Musk, The Regimental Double of The Queens Own Rifles of Canada.
Men of Harlech, the Regimental Slow March of The Welsh Guards. A strong tune, we used to sing iat school n the olden days.
The Regimental Quick March of The Irish Guards, is St. Patrick"s Day (circa 1749). It does sound like Garry Owen.
http://www.trooping-the-colour.co.uk/trooping/marchpast.htm