In reply to Dave Morrison:
Can't comment specifically on what the Brenin do or don't actually deliver, but a few years ago I moved the family down to Wales to follow a college course which promise a whole host of NGB's, as well as an HND in Outdoor Ed. A complete waste of time. I left after the first year with my SPA and ML training and 3* kayak, but no thanks to the college. They had no intention of putting anybody through their NGB's, it was all just a mrketing ruse.
We get a lot of people applying to work for us who have spent three years at uni doing outdoor stuff and now think they're God's gift to the industry, then they arrive on site and can't even belay. NGB's are the only way in to serious outdoor work. The big 3 of ML, SPA and Level 2 canoe are still the currency you need, then the world's your oyster.
Personally I would be very skeptical about anyone taking my £8,000 and promising the worldm unless I had seen a written transcript of their last 100 students, showing what they came with and what they left with. Yes, I confess, access to groups is somewhat essential, but you can also get that freelancing yourself to a number of different providers for a good long season.
From an accounting point of view, it will be a long time before you make that money back in this industry. Perhaps it would be more worthwhile to earn as you learn with a few different providers to make sure that you've got a good, broad experience base, then NGB yourself as and when you're ready?
Hope this helps,
Rich