Personally I'm on the "if you're going to fly in this country then learn in this country" band wagon.
Yes but Cloud69 started to fly in Jan 2000 and if he had gone to the USA to do the PPL then he would have had a PPL since Feb 2000 and wouldn't be fafing around now!
Believe it or not, the same rules of aerodynamics works in the UK as the USA and most of the airplanes are the same anyway!
Go to the USA and do the PPL and then you can do the summer season in the UK as a pilot rather than as a student. The dollar to pound exchange rate makes the opportunity too good to miss. Fantastic flying experiences in the USA too!