To all who wanted to see a list, please look at this link:
http://www.stevenfallon.co.uk/mountainguideequip.htmlIt is a quite complete list, and some items I never bothering taking (midge repellant, sun screen, wistle, survival bag and -horror, horror! - the first aid kit*) but I would take seriously the part on clothing.
Others I only use seasonally, like hot drinks (only in winter). Also unlike most Brits I don't do gaiters, almost all the time, and never had a problem.
I do however always take wind/waterproof over trousers, and use them fairly frequently.
I am a big fan of walking poles, they help a lot both going up and down. Never go for the fancy ones, buy the cheapest you can find (mine were £10 a pair)
Lastly, don't forget a nice pair of thick, cushioned socks! (I also use very thin liners inside - I avoided for many years but I have become a convert to liners about 8 years ago).
* I know I will get some flak for this one... my point is that a few plasters are not useful at all, I have not needed compeed for about 25 years, and if something more serious happens it will require more equipment and skills than most first-aid-kit-owning mountaineers possess. The best defense is prevention.