It’s 74 years since the daring Second World War night-time raid that became known as the Dambusters' mission.
The annual Dambusters Charity Motorcycle Ride started five years ago and aims to raise thousands of pounds for the RAF Benevolent Fund.
Motorcyclists travel to Germany each year to commemorate the wartime exploits of 617 Squadron, who were nicknamed the Dambusters after their most famous raid on the Ruhr valley in May 1943.
Alan Frost , one of the participants, said the trip made him think:
“It was devastating when it was done (...) To come to these places and commemorate those that died on both sides is just something that is really good to do.”
The dams they destroyed led to flooding and to some disruption in Germany’s industrial heartland.
It also showcased a revolutionary bouncing bomb designed by the inventor Barnes Wallis.