Just my 2 cents for you IT fellows...
Im 23 and work in IT - My title is Systems Engineer/Analyst but i basically do Networking and maintaining servers, router some support etc. I didn't go to Uni and instead started as an assistant when 18. Just started a new job on £35K with bonus etc. Based in Reigate so not even in London.
Was simply a case of, "oh thats a nice job advirtised with a tidy sum", 1st/2nd interview and the job was done.
Its well possible to be earning good wonga at a young age so long as you Market yourself well.
There are so many avenues in IT that you can sail down, however some earn more than others, and some have more poitions than others!
I'm living at home now and earning some good cash so hopefully save myself into the cockpit soon! As i really don't fnacy being stuck behind a screen doing 9-5 all my life!
Al the best