Ask HN: Planning to work in London

I'm planning to move to London (from Australia) next year and will be looking for work. I have approx. 2 years self-taught experience in iOS development, and some experience in Rails. I've just started my final year thesis in relational database/social graph construction, and will be graduating at the end of the year. What sort of chance do I have of getting a job in London? Is there anything in particular I should be doing to increase those chances?

Thanks in advance for helping out.