Caught london guards forgetting next step and had to shuffle back

Tourism, Travel, Clock, Symbol, Illustration, City, Tower, Famous, Architecture, Red, Silhouette, Big, Tourist, Icon, Set, Vintage, Europe, Sightseeing, Landmark, Vector, Tea, Queen, London, Uk, Bridge, England, Military, Culture, Traditional, Ceremony, Tradition, Umbrella, Parade, Britain, British, Unitedkingdom, United, Flag, Bus, Telephone, Uniform, English, Soldier, Guard, Hat, Kingdom, Ben, Royal, Crown