Im in the same boat.
I should have started a PPL and had a lesson every week day for the past 3 weeks, but all of my lessons have been canceled due to weather! I'm training at multiflight, so its no surprise!
Im getting sick of it now, and my instructor has said, although its alot different, if I'm aiming to get a ATPL then I should go to Florida and do a PPL then come back and do some familiarisation in the UK before the CPL stage simply because its much better to train in better weather and its going to save sooo much money!
If I was only wanting a PPL for fun then I wouldnt be bothered, but the money that can be saved that could be spent on ground school by going to the USA tempts me!
Could I do all the exams then head off to the USA with 0 hours?