A licence is a licence I would have thought! You do the same exams and get the same end product, some people sit half them here in FL and half them in Gatwick once groundschool is over, is an airline going to care?
With distance learning in schools like Bristol you could be any where in the world, even Kazakistan, but the exam centre will always be CAA approved and the piece of paper at the end will still say the same thing.