Men of the 8th Battalion, East Yorkshire Regiment going up to the line near Frezenberg during the Third Battle of Ypres, 1917.
Winston Churchill with his Chiefs of Staff in the garden of 10 Downing Street, 7 May 1945.
The Operations Room at RAF Fighter Command's No. 10 Group Headquarters, Rudloe Manor (RAF Box), Wiltshire, showing WAAF plotters and duty officers at work, 1943.
Squadron Leader Brian 'Sandy' Lane, CO of No. 19 Squadron (centre) confers with Flight Lieutenant Walter 'Farmer' Lawson and Flight Sergeant George 'Grumpy' Unwin at Fowlmere near Duxford, September 1940.
A raiding party of the 10th Battalion, Cameronians (Scottish Rifles) waiting for the signal to go. John Warwick Brooke, the official photographer, followed them in the sap, into which a shell fell short killing seven men. Near Arras, 24 March 1917.
A heavily-armed jeep patrol from 'L' Detachment SAS in North Africa, 18 January 1943.
Two Battle of Britain fighter pilots, Flight Lieutenant Brian Kingcome (left), commanding officer of No 92 Squadron RAF and his wingman, Flying Officer Geoffrey Wellum, next to a Spitfire at RAF Biggin Hill, Kent, 1941
The Royal Air Force: The rear gunner in his position in a Wellington bomber.
Pilots of No. 303 (Polish) Squadron RAF with one of their Hawker Hurricanes, October 1940.
Film still from the D-Day landings showing commandos aboard a landing craft on their approach to Sword Beach, 6 June 1944.
Armourers wheel trolleys of 500-lb GP bombs toward the open bomb bay of an Armstrong Whitworth Whitley Mark V.
A Heinkel He 111 bomber flying over the East End of London at the start of the Luftwaffe's evening raids of 7 September 1940.
A Douglas Dakota of BOAC at Gibraltar, silhouetted by searchlights on the Rock.
45 Royal Marine Commando marches towards Port Stanley during the Falklands War, 1982. Marine Peter Robinson carrys the Union Flag on his pack.
Wounded men being tended in a trench near Beaumont Hamel on the morning of the initial assault, Battle of the Somme, 1st July 1916.
Wounded British soldier showing shrapnel damage to his steel helmet caused near Hamel on the Somme Front in December 1916.
Women pilots of the Air Transport Auxiliary (ATA) in flying kit at Hatfield, 10 January 1940.