Well, I ended up going for an
Oxford Products Chill Out Neck Tube, which is going to have to be passed on to one of my motorcycling colleagues as it isn't really any use for cycling in.
Before you all howl "well we told you to buy a buff!", let me explain!! I bought it as I wanted something to cover me snout in the cold weather, as well as keeping my neck warm. This looked to fit the bill but (a) the back of me head still gets chilled and (
the ventillated panel near my mouth isn't big enoung so you end up sucking the sides against your face when you breathe in and gasping for air. Added to which, the seal around the nose bridge isn't good enough so my yellow-lensed specs steam up completely!
I think I'll look in Peterborough's recently opened branch of the mountain warehouse as they seem to have a good range of neck warmers, balaclavas, snoods etc on their webpage.