I don't know when Surface Pro will come out in the UK, but like you I hope it won't be much longer. It sounds like you're not interested in the digital pen feature, so you can also consider the Acer Iconia W700 tablet with a Core i5 and 11.6" full HD display. In the US it's priced very competitively. There's also the Samsung ATIV Smart PC Pro 700T, which is a bit more expensive but has a detachable keyboard. Both are reviewed on our site and you'll find them featured on our home page. They're a little bit larger than the Surface since they're 11.6", but not much larger.
Other than the power plug prongs, I don't expect you'd have compatibility issues if you imported one from the US, though you might have trouble with warranty service if needed.