How to dress a Beefeater
17 February 2012 Last updated at 11:35 GMT
John Keohane recently retired as the Chief Yeoman Warder - otherwise known as Chief Beefeater - of the Tower of London.
Presenter Matthew Stadlen wanted to get a sense of what life was like in his shoes so he spent some time with him during his final weeks as chief.
He accompanied the chief on his ceremonial duties and asked questions about the Tower and its history along the way.
You can see the full documentary On The Road With The Chief Beefeater at various times on the BBC News Channel including at 22.30GMT on Saturday 18 February and 10.30GMT on Sunday 19 February.