Some interesting footage I hadn't seen before, particularly of the remains of E-Elsie; the implication that much of this was unknown or secret was stretching things a bit. I recall reading about most if not all of the ops in Paul Brickhill's book, serialised in John Bull magazine in the 1950s. Certainly the Ems Canal, Bielefeld viaduct, 'ski sites' and supergun, U-boat pens and Tirpitz. And the D-day 'window' phantom fleet.