The Prince of Wales reviewed his troops on horseback on Saturday as at least three soldiers fainted in sweltering London temperatures.Thousands gathered at Horse Guards Parade in St James's Park to witness The Colonel's Review ahead of Trooping the Colour during the King's Birthday Parade next week.William acknowledged the "difficult conditions" in a tweet he personally signed with his initial.

The Prince of Wales reviewed his troops on horseback on Saturday as at least three soldiers fainted in sweltering London temperatures.Thousands gathered at Horse Guards Parade in St James's Park to witness The Colonel's Review ahead of Trooping the Colour during the King's Birthday Parade next week.William acknowledged the "difficult conditions" in a tweet he personally signed with his initial.