Thank you for replying, I really appreciate it!
In regards to what I now know since posting my first message, we can take out a Professional and Business Career Loan. Only two banks do this, Barclays and Co-op. You can only apply to one or the other.
The only issue with this is that you can only get up to £10k.
It's quite good news for me, but I still need to find another 2 grand.
And yes, you're right. It's very unfair that there is hardly any help... Everyone keeps telling me it's a lot easier once you are in the chosen country.