This coat is SERIOUSLY waterproof, covers your bum and is nicely fitted at the waistline with a great hood. I wear the size Small, which is a 10 but if you are blessed with norkage and in between sizes, you will want to size up as it is snug at the bust. If black is not your thing, it's available in red on the Taunton Leisure website for £96.99 with free UK delivery.
Or in the greeny/grey colour I have at Nevisport for £110:
It will serve you well in this awful weather - I speak from experience! x