In reply to AG:
I did my assessment in September 2013 at Glenmore Lodge. Like you on the first day we were asked to have our ML sack packed.
I had a 30m half rope, 4-6 person group shelter, belay jacket plus all my regular hill kit. You were asked why you had the different kit etc.
I didn't pack a helmet for that first day, I only took one on the safety on steep ground day and we were all told to make sure we had helmets that day.
At many of the big centres you can borrow kit but the assessors may question why you don't have your own as if you're intending to lead groups etc then you probably ought to have your own stuff, eg rope, group shelter etc etc
On my assessment I used one of the centres large rucksacks. My assessors queried this as they felt a large sack was something I should own. I have one but was going straight from assessment to a club weekend at a hostel with minimal drying facilities and thus figured anything I could do to minimise the amount of wet kit I had would be good.
All the best with the assessment.