Over 7,000 Lancasters were built and their bombing capabilities led to their use in the famous 'Operation Chastise' raid.

After Operation 'Chastise', German forces discovered in some woods, an 'Upkeep' bomb that had failed to explode.

This is due to the fact that it is the same weapon which was used in Operation Chastise, better known as the Dambusters Raid.

They were also used to protect dams, and led to the development of bouncing bombs to defeat them, as in Operation Chastise.

After Operation Chastise, German forces discovered an Upkeep bomb intact.

In 1943 617 Squadron was created to carry out Operation Chastise, the raid against the Ruhr dams.

The plan was given the codename Operation Chastise and was carried out on 17 May 1943.

However, on closer inspection, Operation Chastise did not have the military effect that was at the time believed.

Operation Chastise caused some temporary effect on industrial production, through the disruption of the water supply and hydroelectric power.