How about Google? http://www.google.com/about/jobs/locations/london/
If you didn't have to be in London, I'd highly recommend looking at Red Gate. They're, by far, the best company I've ever worked with: http://www.red-gate.com
If you didn't have to be in London, I'd highly recommend looking at Red Gate. They're, by far, the best company I've ever worked with: http://www.red-gate.com
Not to mention people who are self-taught...
My mistake as I applied to SRE and probably I should have gone for Software Developer instead, but too late for that now.
It has to be London, a pity as I read fantastic things about Red-Gate :)