Well, in my day.....it was so much cheaper to fly power in the USof A....
If still the case, it can do no harm to enjoy a flying holiday in Florida, and Tampa Bay is uniquely beautiful, the major airport in Tampa the most beautiful and friendly place. There are a number of smaller training places around the bay....spend your time on the flight over to Yankeeland doing your book learning....somebody here will be able to recommend a good text to take with you.
Then when you come back to the UK, you are already experienced in handling. A useful idea would be to decide on your British training place beforehand, find out what type of aircraft is used. For example, Warrior, Cesna 152 (if you are slim) or Tomahawk or whatever. And do your American flying in that type.
Time airborne is never wasted.