Researching companies with offices in the UK and [specific city]

Hi everyone -

The primary dream of my heart at this stage of my life is to spend more time in England - ultimately full-time, but even part-time (i.e. six months per year) would be great. As such, as I am currently in the market for full-time employment (having spent the past seven months as a freelance software developer), I am looking for companies that have offices in both the UK and Phoenix, Arizona. I've found one sort of by accident, but finding others is proving quite difficult - I can't seem to come up with the right Google phrase. Then again, perhaps there is a specific online resource that would have the answer to this type of question.

I would appreciate the community's input in how I can best accomplish this.

Thanks!

-- Chris V.