Prince William, wearing fatigues and a beret in his role as Colonel-in-Chief of the Mercian Regiment, attended ceremony marking the start of their six-month deployment in Estonia as they take over from the Royal Dragoon Guards.

On the second day of his Estonia trip, Prince William visited British troops at NATO's external border with Russia. He conducted the meeting in military combat uniform.

The historic visit emphasized William's role in international relations, and though much focused on military operations and Estonian-Ukrainian relations, the royal still got a few jokes in. “How’s it working with the Brits?