The gryocopter is a Flettner - can't remember its detail.
Used as over-the-horizon spotting for u-Boats - Sorry Gottfried, we had to dive, but thanks for the warning!
The plane filling up is interesting - it has a Siskin look, but is a 2 seater.
Its an Armstrong Whitworth plane, with one off their engines, and its carrying out tests on HP leading edge slats (the big hinge fairings under the top wing LE)
It looks also as if the fin has been made much higher - again because of the low speed regime its flying in
'part from that you have me stumped