Hi there,
Yes, as already posted, it's very very beneficial to be a cash purchaser - the banks will love you!
Just as best practice in this case, I'd suggest you don't actually buy the house in full. Arrange a 5 or 10% mortgage and begin paying that back. This will help you increase your credit rating here in the UK - as you'll have such a relatively small amount to pay back each month, the banks will see that as a small risk, the credit agencies will be able to start increasing your score and you'll have just that 'X' little bit of money left to perhaps go towards council tax or utilities etc.
Of couse, if you already have a great credit rating in the UK, then discount the above and go in with a 'cash offer' - see if you can knock perhaps 5 grand off the asking price. It's doubtful, as any seller right now is trying to totally 'maximise' their selling price, but worth a go!
Cheers, DtM! West London & Slough UK!