Yeomen Warders
The Yeomen Warders of Her 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 at the Tower and safeguarding the British crown jewels, but in practice they act as tour guides and are a tourist attraction in their own right, a point the Yeoman Warders acknowledge.
The Yeomen Warders are often incorrectly referred to as Yeomen of the Guard, which is actually a distinct corps of Royal Bodyguards.
Read more about Yeomen Warders: Etymology, Composition and Duties, Ravenmaster