RED,
I for one did my PPL in Scotland and then went to states to hour build. When I was out there, I never saw a cloud and 5 knots wind max, hardly what you would call a good training environment for students who could come back to UK with a PPL and then go flying in the Highlands of Scotland.
As far as I'm concerned, there's no substitute for training in the area/ country you will be flying in. and I would suggest any training done at any FTO in Scotland will provide the student with the best training environment available! If anyone can competently fly in Scotland then they should be able to cope with almost anything.
The PPL is the foundation for all future flying, so it is important that it is done properly and not compromised by cost!!
C99