Hello Swissnic.
I was on the same course in May 06. I would advise against taking too much kit. Of your current kit list, I'd just take the Petzl head torch and spare batteries, take your tent only, you'll be issued with a bivi bag and hoochie when you get there on the 2nd day, take your large rucksack and your day sack only, your mat and sleeping bag are ok to take, don't take any knives or saws, you will be issued with them when you get there, and the instructors will prefer it if you use the issued knife, take your water bottles, but not the stove or billy can as again you will get billy cans issued to you, and you will be doing all your cooking over a camp fire, just take what clothes you stand up in, and one change only, nylon cord is useful, but not too thick (para cord is ideal) boots, hats etc all good.
Have a great time, it's a blast doing that course. Try not to be intimidated by any "Mini Mears" types that seem to arrive with every item of kit that is available from the Woodlore shop, as they only have to carry it around with them when you go on your 3 day hike. Take a large dose of sence of humour with you, and brush up on plenty of jokes to tell round the camp fire of an evening.