Royal Marines have given an amphibious capability demonstration with the Royal Netherlands Marines on the River Thames, as part of events to mark the state visit of King Willem-Alexander and Queen Máxima.
Using blank ammunition, the on water capability demonstration comes after it was revealed HMS Queen Elizabeth will be joined by a Dutch warship during the aircraft carrier's first deployment in 2021.
The monarchs watched the ten-minute display with the Duke of Kent on board the Dutch ship HNLMS Zeeland, which has been anchored next to HMS Belfast.
Defence Secretary Gavin Williamson said: "Our forces have worked closely with the Netherlands amphibious forces for more than 45 years, demonstrating world-class military integration.
"Right now, our Royal Marines are working alongside their Dutch counterparts in Norway as part of the Defence Arctic Strategy, which shows our deep shared commitment to European security.
"This state visit allows us to take stock and celebrate an enduring alliance with one of our closest defence partners."
Lieutenant Colonel Jerry Slack, from the Royal Marines, speaks of the relationship between the UK and the Netherlands:
"We don't just follow the same rule book - we almost gell together."
Before the display, Colonel Simon Scott OBE, Commanding Officer 1 Assault Group Royal Marines, said: "We train and operate extremely closely with our Dutch counterparts and are well practised in our collaboration.
"The Royal Marines and Royal Netherlands Marines have a long history of serving together on operations across the globe, most recently offering humanitarian support to islands affected by Hurricane Irma in the Caribbean."
This year marks the 45th anniversary of the UK/NL Amphibious Force, which is comprised of commandos from both nations.