Sam,
The first point that you might want bringing to your attention is that it pays to be sceptical. I've taken a look at UKFT's website and the fact that they're heavy on marketing (for instance they refer to one of their courses as being 'recession-proof') would lead me to be suspicious.
As for your query the 'JAR compliant' licence that they offer training towards seems to be a FAA PPL in disguise. I'm afraid that I can't tell you anything about the pratical terms of having such a licence and how it would affect your aspirations.
Hopefully someone with more knowledge on the subject will be able to give a more comprehensive answer.