What’s the best thing about Autumn? Is it the leaves turning a lovely shade of gold as they fall from the trees? Maybe it’s the crisp Autumn mornings? The chance of an Indian Summer? For me, it is none of those things. The best single thing about Summer turning to Autumn is the chance to wear a trenchcoat. Of all the coats, jackets, cardigans and cover ups that we wear, the classic trenchcoat is the most iconic. It works in any shade, can be worn with the belt fastened neatly, or tied jauntily, and is just as good as a short jacket as it is in the classic knee-length version.…