From the "Sense and the City" exhibition at the London Transport Museum. The image was illustrated by Frank Tinsley around 1950.
isodesign.co.uk - AV installation at Museum of London
Can it be Done? Scoops magazine UK (1934/1935). https://www.google.co.uk/search?biw=1366&bih=622&source=lnms&tbm=isch&sa=X&ei=9aL5VNWdE8SBUbivhPgH&ved=0CAcQ_AUoAg&q=Can+it+be+Done%3F+Scoops+magazine+UK+(1934+-+1935)