The Queen's Guards: A Year in Service

Those in Windsor at Battalion HQ are preparing for the most important inspection of the year when they find out if they're ready to take on this season's biggest royal and ceremonial duties - known as going on the Blue Line.

News breaks of the death of HRH Prince Philip, Duke of Edinburgh, and instantly the Coldstream Guards are drafted in to begin preparations for their most important ceremonial occasion in decades.

25 Platoon have finished training and pass out from Catterick ready to start their new lives in central London, living only metres away from Buckingham Palace. They move into Wellington Barracks, get fitted with their greatcoats and even learn how to wash their coveted bearskins.

Rehearsals for the Queen's birthday parade are ramping up, and with more than 300 guardsmen and horses involved, Garrison Sergeant Major Vern Stokes has to make sure everyone is up to scratch. For Lt Col David Marsham, this is the first time he has commanded such a parade, and a lot rests upon his shoulders.

It's finally the big day in Windsor and all eyes are on the Coldstream Guards as they lead the procession for the Queen's Birthday Parade. It will be Lt Col David Marsham's first time in charge of this iconic event - the most high profile ceremonial event of the year.