A British Merlin helicopter fly over a mountain ridge during practice in the Arctic, near Bardufoss, Norway.
In 2019 the Arctic exercise Clockwork passed 50 years of training in Norway, and now has a permanent base within the Norwegian Air Force base at Bardufoss.
845 Naval Air Squadron is a squadron of the Royal Navy's Fleet Air Arm. Part of the Commando Helicopter Force, it is a specialist amphibious unit operating the Leonardo Commando Merlin Mk3 helicopter and provides troop transport and load lifting support to 3 Commando Brigade Royal Marines.
©Fredrik Naumann/Felix Features