Thanks for all the advice. I'm going to start off with my old ski jacket and take it from there. I've got too much natural padding (alas) to get cold quickly, but from experience oce the heats gone you freeze fast!
Any suggestions on eye wear? I think I need some sort of wrap around glasses, and I think my old motorbike helmet will be going too far. (unless I ever venture onto a motorway, in which case it may go on!). Again I'm after something practicle rather than trying to make a fashion statement.