The difficulty that you may have, is that pilots being human often don't use the standard phraseology which you will need to pass the exam.
Furthermore, American pilots will use very different phraseology to CAA pilots which again will lead you down the wrong path.
The best place to get the correct phraseology is CAP 413 which you can get by clicking here.
It's the bible for UK phraseology, and it's what your RT examiner will expect you to follow.
I hope that helps.