One of the most celebrated style icons of the 20th century looks set to emerge as a key influence for 2011. Wallis Simpson, the women for whom Edward VIII gave up the British throne, is the topic of the new film WE, which is currently being directed by Madonna. This will follow on from a Christmas radio play, and an appearance in a classy Channel 4 drama. Wallis Simpson, Nee Warfield, was a true style icon. She was not classically beautiful, but she knew how to dress with elegance, style and impeccable good taste.  Her wit and personality, along with her effortless style,  made up for a lack of  typical…