Blimey. Just found this.
Firstly I’m reasonably confident that the wetsuit modelled third from left is still with us and was recently experimented with by former president Henry, as shown. Unfortunately whilst most of him went in the odd dangly bit didn’t.
Secondly you will of course note that the 1970 photo was taken outside SWCC, which eerily enough is where we are going this weekend. Hang on, I can feel a historical re-enactment coming on…..
And come to think of it that rope looks awfully familiar.