While wandering back from a meeting with a hedgie on Haymarket, I noticed a banner emblazoned with the logo of Browns, clothes shop to the well heeled (to mix metaphors), above the entrance to what appeared to be a building site. It was indeed a building site, off Marshall St, near Carnaby St, but two floors of the new apartment block there have been taken over by a pop-up exhibition to celebrate 40 years of Browns.