In this unique footage from the IWM collection, filmed shortly before the Dambusters' Raid in May 1943, an Avro Lancaster flies low off the Kent coast trialling a cylinder-type "Upkeep" bouncing bomb. Learn more about the incredible story behind the raid: http://bit.ly/2rPxxAK © IWM MTE 3437 | Imperial War Museum Duxford

One of the greatest British war movies of all time, THE DAM BUSTERS is newly restored in 4K to commemorate 75 years since the WWII raid. Don't miss a special Royal Albert Hall gala screening of the much loved British classic and broadcast to cinemas across the country for one day only on May 17th. Book your tickets now: www.thedambusters75.co.uk | STUDIOCANAL