I've praised Andrew Ritchie's design many times. He looked at the bicycle and inspirationally said 'anything that sticks out needs to fold in'. He then put in years of painstaking prototyping to make that happen.

He was of course inspired by and drew from the Bickerton, Moulton, Le Petit Bi and eventually incorporated Dr. Hon's patented 45º folding handlepost.

Last time I was in London, I went by mecca: