In reply to Antobailie:
This is a *lot* more useful a thread than most of the stuff that gets posted on here, A, so thanks for posting (I'm off to look at the softie trousers in a mo). I hope you find some of the advice useful.
I'd second most of the advice already given - but perhaps a note of caution with heated clothing *if* any of your issues relate to poor peripheral circulation. Although they don't get all that hot, application of direct heat to tissue that is poorly supplied with blood can lead to thermal tissue damage surprisingly quickly (it's a common theme under anaesthesia in veterinary surgery). If on the other hand, your problems are solely neurological, it might not be an issue - but best to check with your doc first.
I've got to the stage in life where I spend more time on touchlines watching than actual running about, and I definitely agree that trapping heat when inactive is a major issue: I now use scarves, cinch drawstrings in and make sure my sleeves overlap gloves. Hood / hat combos are a must as well and I've always favoured a pair of Ron Hill tracksters under trousers - never let me down.
My favoured combo is baselayer - PHD minimus vest - Rab belay jacket - waterproof. For hands, I've a pair of waterproof Montane primaloft mitts, with a very thin pair of stretchy gloves underneath. For feet, smartwool socks and NEVER wellies. That lot generally sees me through the boy's footie practice. Plus a giant lamb and mint pasty from the local bakery.