Yeoman Warder character jug produced by Royce Wood of Derby, England, circa 1985. The Yeomen Warders of His Majesty's Royal Palace and Fortress the Tower of London, and Members of the Sovereign's Body Guard of the Yeoman Guard Extraordinary, popularly known as the Beefeaters, are ceremonial guardians of the Tower of London. In principle they are responsible for looking after any prisoners in the Tower and safeguarding the British crown jewels. They have also conducted guided tours of the Tower since the Victorian era. All warders are retired from the British Armed Forces and must be former warrant officers with at least 22 years of service. They must also hold the Long Service and Good Conduct Medal. The garrison consists of 32 Yeomen Warders and one Chief Warder.