From what I've heard, transfering a US licence to UK can take up to a year, plus you'll probably have to take the exams you wouldn't have done in the US. I also hear that it can cost a fair ammount to change it over to the UK (although exactly what the costs are I couldn't say).
Add on the cost of the flight over there and paying for your living/accomodation and it works out almost as expensive as the UK licence!
So unless you really want relatively unspoilt weather and a bit of a holiday whilst learning, or you're prepared to go through the hassles and costs of converting your licence, learn in the UK!
