8746349243_46ce123f30_o - from our story 'Guy Gibson of the Dambusters, and his Desert Island Discs' Operation Chastise cypher Description: Operation Chastise cypher authorising immediate attack Date: 15 May 1943 View The Article THIS WAY FOR ALL GOOD THINGS Visit the shop T-SHIRT OFFER – 15% OFF ANY 3 Discover Our PrintsExplore our Prints Shop Editor’s picks TODAY: 15% off all T-ShirtsDiscover Our 100% Organic Cotton T-Shirts Collect our postcards 10% Off – JUST SIGN-UP FOR FREE: First Name Last Name Leave this field empty if you're human: