It doesn't apply to your immediate quandary, but there are many grants (perhaps one that might help?) and other opportunities for artists in London (and elsewhere) at this website:
look in the "London Almanac" then under "Submissions and deadlines". They offer a wide range of London-centred help for artists, and if anyone can help, they can.
Incidentally, I'm in a similar position, being a dual UK-US national born and living in the UK. I'd like to go to the US to continue my book arts studies at MFA level. I work to a great extent with digital technology. Any ideas about places and funding for me, too?
Thanks, Andrew Eason