In the TikTok video, a guard shouts: "Stand back from the Queen's lifeguard, don't touch the reins." An Army spokesperson told Insider guards must shout loudly if tourists get too close to the horses.

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A video shows a member of the Horse Guards shouting at a tourist for touching his horse's reins. In the TikTok video, a guard shouts: "Stand back from the Queen's lifeguard, don't touch the reins." An ...