London is marking the centenary of the tank with a replica First World War machine in the capital's Trafalgar Square.
The Tank Museum's Mark IV vehicle was moved into the square in the early hours of the morning to commemorate 100 years of technological innovation since its first use at the Battle of the Somme in 1916.
A total of 1,220 Mark Series tanks were built, accommodating an eight-person crew and travelling at a top speed of four miles per hour.
-- Admiralty London (@AdmiraltyLondon) September 15, 2016
Members of the Royal Tank Regiment stood guard while onlookers took pictures of the machine, which featured in Steven Spielberg's 2011 film, Warhorse.