For the very first time cameras have been allowed behind the scenes at the royal palaces to see the historic and hidden world of the Grenadier Guards.

In the second episode posh but tough Major Thorold Youngman Sullivan and no nonsense right hand man Sgt Major Steve Munro have their work cut out to maintain the impeccable Grenadier standards.

In thie third and final episode, the Guards on ceremonial duty are in London practising for Trooping the Colour alongside their regimental rivals, the Coldstream Guards.