I have a UK PPL, but have never flown or trained there and so can't comment on that part.
Now that we've established I did my training outside the UK, I can also say that I did about
10 hours of flight training in Sweden (over the course of 6 months) and finished the balance over
about a three week period in a country with a much more pleasant climate. I can agree with
other comments made that having completed the theory and R/T exams before going away are a huge advantage.
It made the schedule much easier for me to cope with in terms of focusing on the flying and being able
to apply the relevant theory in practical situations.
Freed up the evenings to go to the bar as well.
I haven't had any problems coping with the bad weather here or in other countries after receiving
a "fair weather PPL", nor have I had any R/T issues.
Fly how you trained, know and keep to your limits, and have fun!