A sadly familar tale (and not just in Winter or Spring) but you must have been warned about this beforehand by the CFI or were they only wanting your money?
It's easy to understand why Flight training clubs in the UK cannot compete with the US. How many hours (how much has it all cost you) to date?
Can't see the point of bothering and paying loads more in the UK unless your job or relationship means you aren't allowed to go to the US for 2 or 3 weeks.