Beefeaters (or Yeomen Warders) 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. Becoming a Yeoman Warder is not easy. A candidate must have at least 22 years of service in the Armed Forces. In addition to length of service, all Yeomen Warders must also have been awarded the ‘Long Service and Good Conduct’ medal during their time in the armed forces.