If I had to pick my favourite shoe era, it would probably be the 1970s. I am kind of besotted by the idea of chunky wooden platforms, Scholl style sandals and any other summer shoes that are far removed from the Gladiator, strappy style sandals we live in today. And all this probably explains why I am such a fan of Clarks Originals. Alexa Chung is another lady who seems to be at home in the sort of sandals I remember wearing as a little girl. Her feet are constantly adorned with the sensible strapped flat sandals that make you think of scuffed knees and grass stains, and yet just…