Lot's of companies do that, but the UK is kind of a strange place to choose to do that. If you want cheap, go hire a team of 10,000 engineers in Penang (I'm looking at you Intel). If you want expensive, choose silicon valley. If you want 2nd tier, take a look at Canada. You can choose the UK, but why? Their time zone means you'll never be able to meet with them at the same time as your Malaysian and Californian offices. They're cheap - but no where near as cheap as the far east. And they've got a metric shit tonne of employment rights, which most US companies not only don't want the cost of, but also disagree with ideologically.