SASless - precisely, except that the film showed all four blades via the prisms.
Sycamore - went looking for those photos you mention but couldn't find anything. I'm probably having yet another senior moment
However, I did find on Page 19 the Pathe newsreel of the Thorney Whirlwind ditching. We were shown that at Thorney as a warning about the perils of failing to check your fuel contents!! (Yep!! they ran out!!)
Boss driving and Grant Scroggins in the back, so the intermediate 2 crew stage between the Sycamore and the 3 crew Whirly 10. Such memories!
They're at RATW Post 299
SP