Imagine my surprise, not long ago, to discover I wanted to write a glowing article for my travel series “Best of London” about a department store! (Just when did I fall and hit my head, anyways)? But no, there were no mishaps involved. If anything, our discovery was what I would term a “happy accident” as we wandered down Piccadilly Street, the atmosphere vibrant on this uncommonly sunny London day. We paused to focus on the historic grandness all around us – and what should our eyes alight