Prince Harry and Meghan Markle wedding: Hyde Park Barracks prepare for ceremonial duties

Prince Harry and Meghan Markle wedding: Hyde Park Barracks prepare for ceremonial duties; ENGLAND: London: Hyde Park: INT Unnamed officer explaining the difference between the Blues & Royals and Lifeguards uniforms SOT / uniforms on display in Fulldress Store / swords on display / regimental flag on display / helmets in storeroom EXT GVs of State trumpeters rehearsing SOT INT GVs of uniforms in storeroom EXT GVs State trumpeters rehearsing SOT / Mounted cavalrymen and one on foot pose with tank / soldiers in uniform pose with tank / various troops posing with tank / trumpeters posing with tank