Boden isn’t a site I remember to visit a lot, but they do have some really nice pieces.
One of them is this “Kate” dress, which appears to be a regular item on the site, rather than seasonal. On the models it falls below knee length and it has a fitted waist and 3/4 length sleeves, perfect for chilly days. A lot of the reviews also mention how warm it is, which is a good sign!
It also comes in a range of colours. I love the green, but I would, I love green. They also have it in a berry colour and grey.