It seems to me that water flying is rather restricted in most parts of Europe for some unconceivable reason.
Not so in the north however, for example Sweden.
You'll find thousands of lakes of which only a few are restricted and seaplane training as well.
Instead of investing heavily in a training outfit in the UK, why not take a trip up here? Or create a package deal...
We already have the planes, examiners, instructors and experience, plus tons of water!