Having had the 'pleasure' of doing some (non-aviation) graduate-level interviewing, I completely agree with Keef. Unless you could convince me in the interview that your reasons for dropping university were valid then you wouldn't get the job. Full stop. You've dropped one thing 'because your heart isn't really in it' - we wouldn't take the risk that you would do the same thing with us.
I recognise that the aviation world is different here - it's one of the few well-paying jobs where they will not care. However, I think getting your degree is still relevant because you've got to get that CPL/IR - assuming that you aren't in a position to write a cheque for £60k and head off to Jerez then you'll have to earn the money. Dropping the degree could hit you twice here - you are going to have to explain to any prospective employee above the McDonalds level that you've dropped the degree, but you've got to do it without telling them you've left to chase a CPL/IR - if you admit that you're going to leave as soon as you can they're going to give that job to someone else anyway. As Keef says, sorry, but that's life.
There's no real hurry to train right now, so what I would do is get the degree, get a well-paid graduate job (there are still plenty around, especially in IT) and work for a couple of years saving your pay while doing the modular stuff evenings and weekends. When you're ready, dump it all to do the IR etc. and chase that dream job.