Latest purchase is a Nevica Skuff.
It's a reversible snood-like thing with a fleece lining that can be used as a neckwarmer, facemask, snood, headband/earwarmer or hat.
Very versatile and initial tests show it's very warm.
Sports Direct have them on their website. Make sure you get the reversible fleece one though. The cheaper ones look to be only single layer, but may still be worth it as a handy neckwarmer. Mine was £7.99 and looks good quality for the price.