In reply to martinlird:
You can get down stuff, even off-piste, with naff technique and there's plenty of Brits ski touring in the Alps to prove this (myself incldued). However you'll have a lot more fun with better technique and bad habits learnt early can take weeks of skiing to get fully rid off.
Unless you're spending a small fortune in a snow-dome in the UK, your miles skiing in resort will soon outstrip those in the UK, so may be worth skiing some of these with an instructor.
The other question not really touched on by others is the group dynamic. How experienced are your mates and how willing are they to ski with you the whole time? If you think you'll be happy skiing on your own then less of a problem for some of the time, but you would probably learn more in a lesson.
If you plan to do parallel turns before you go, perhaps book 3 half days and see how it goes.