The future king - Colonel-in-Chief of the Mercian Regiment - wore his full military uniform for the visit to Tapa Camp in Estonia as he took part in a trench warfare exercise

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.

Prince William rode in a tank during a visit with British troops in Estonia, calling back to a childhood moment with his brother Prince Harry.