I've seen them in the background of episodes of The Prisoner but this one is really hard to find! http://www.britishpathe.com/record.php?id=70265
Good advert for the time I guess, but they might have edited differently. The amount of time spent folding and unfolding is silly for what looked like a 20 meter ride.
So, was the guy her Dad, or????
I saw a girl riding one in holborn last week, nice looking bike, green with fat white tyres, they weigh a ton though - a modern version, lightweight materials, autohub, big apples, well thought out luggage system, could be a seller.