There was a period of just two months between approval being given in March 1943 and the actual Dambusters raid on May 16/17, 1943.
A major fundraising appeal has been launched by the Royal Air Force and its four main charities as part of the Royal Air Force's centenary.
Dambusters veteran, Johnny Johnson, describes his first encounter with both the mission-modified aircraft and the bouncing bomb itself.
Johnny Johnson, Dambusters veteran, explains what his bomb-drop training for the raid entailed.
Mary Stopes-Roe, daughter of bouncing bomb inventor, Barnes Wallis, tells the story of Wallis’s eagerness to become an engineer at a young age.
On May 18, 1943, the Daily Mirror reported that "hundreds of square miles of devastation have spread through the Ruhr, Germany's most vital and most densely-populated industrial area".
Barnes Wallis, the inventor of the bouncing bomb, knew from the start of the Second World War that he would have an important role to play.
Dambusters veteran, Johnny Johnson, during which he imparted his thoughts on RAF hero and commander of Squadron 617, Guy Gibson.
This May a group of cyclists will echo the journey taken by 19 Lancasters 75 years ago when they set off the Dambusters raid.
Mary Stopes Roe, the daughter of Barnes Wallis, described in an exclusive interview with the RAF Benevolent Fund how her father taught her and her sister and brothers to skim stones on the Dorset coast before the war.