I've had this flasher style mac for years, I generally just wear it over dresses as I always find long coats/jackets look funny over trousers. I don't know why though.
I was also going to wear my black trilby with this look, but it made me look like inspector gadget - so I passed!
As for my face, try not to look at it, I look like I'm about to sneeze! Also this it what happens to my hair when I sleep with it wet.
Mac - ASOS
Scarf - Calvin Klein
T-Shirt - Urban Outfitters
Knee length boots - Topshop