This comment caught my eye a few posts back:
'I know what you mean about fashion though. I recently walked up Snowdon - it was a nice day and I was just wearing a T shirt and lightweight trousers. A lot of folk were wearing waterproof jackets, even though there was no rain, little wind, and it was very warm. I can only assume it was for the look of the thing.'
I don't know how changeable the weather is in the UK hills, but I wouldn't head into the bush here in NZ without at least a rain coat and a woolly hat. If I was venturing above the bushline (around 1300m) I'd be taking a good deal more, fine weather when I set out or not. Wouldn't necessarily be wearing it though, but it would be in my pack.
It's interesting reading this site and comparing the different approach to the outdoors between Europe and here in NZ. For example, no one wears trousers in the the outdoors here in New Zealand. You wear shorts. If it's cold you wear thermals - either wool or polyprop under your shorts, if it's really cold (Snow/Sleet above the bushline) you wear wet weather trousers over this. Trousers of any kind are about the worst thing to wear here, they get wet (no 'if') and then they are heavy and cold. Crossing a river in any kind of trousers is pretty dodgy, you get a great deal more drag, and then they are soaked. Bare legs dry faster than track pants or cotton 'army surplus' type things. This even applies to snow travel, in all but the most extreme alpine environmets. Of course our environment is a good deal different to that of some of this site's members, Sweden or Norway for example. We tend to have a very wet climate in our mountains, although still plenty of snow and ice on the peaks even in summer. I think the temperatures can be nearly as cold, but generally are warmer unless you are out in a storm and have high windchill factors. This for us is the trickiest part of our outdoors - that is the changeability. You are certain to encounter both fairly warm temperatures at the lower level, and high winds that turn even a mild day freezing on the tops, and that's without the fact it will all turn wet and horrible at some stage!
Another thing, we don't generaly light fires very much at all. The philosophy is to leave the bush as untouched as possible. These days it is somewhat frowned upon to light fires. The trouble was that on popular tracks the bush was being damaged by people cutting it down for firewood. You might think your're the only one around lighting a fire, but thats only today. Over time it was tending to cause too much damage and is now discouraged except in an emergency. If you are serious about the bush the attitude is you'll respect it and do not need to damage it, buy a little gas stove of some kind.
Improvised shelters from local foliage is another discouraged practice for the same reasons. Buy a tent or fly sheet (basha), that doesn't require you to cut any plants down for poles or coverings etc.
Our department of conservation (who are responsible for a great deal of our back country) has a saying 'Take only photographs, leave only footprints' The emphasis is very much on moving through the environment without leaving any sign you've been there.
Perhaps for this reason the idea of carrying fancy knives hasn't really caught on. I'm quite keen on knives, I have a fair few, but only carry a lightweight leatherman in the bush. Except for those that hunt deer or goats, there is little need for a sheath knife, since your not encouraged to cut very much with it!