I done exactly that.....Done exams and went out to florida. Came home the next day too. Personal reasons but looking back and flying with somone who did do the PPL in Florida am pleased fate stepped in.
I would consider all your options.... Its not always cheaper to do it in Florida. It does not always work out how the schools say. Anyway this is not what you asked.......
Contact any flying school near buy and they will more than likely allow you to take them around £20-£30 each one 7 in total.
Good idea doing them first