Heres the funny thing. If Bert took that photo today, he would be arrested for upskirting!
Fabulous photo though!
I recommend that anyone unfamiliar with Bert's work look at his pictures online, because in the days before photographers were celebrities his work for Picture Post ( a British equivalent of Life Magazine ) was renowned, he was a sergeant in the army photography and film section in WW11 where he shot some great pictures, and I particularly remember his shots of the U.S. Marines landing at Inchon in the Korean War http://www.slightly-out-of-focus.com...dy_Inchon.html
I think one of the first great medium format photographers was Erich Salomon using an Ermanox camera. These took 4.5cm by 6cm glass plates. He took some excellent photographs under difficult circumstances.