This might be a good idea for someone who is just generally inexperienced or nervous about RT, but the poster is comfortable with RT in the US, just not in the UK. Visiting one small airfield won't get you used to zone transits, MATZ penetration, flying at a controlled airfield etc, so is of very limited use in this case.
I disagree. If you're really comfortable with RT, the fact that the terminology is different is no big deal; you simply learn the new terminology. It's not like it's in a foreign language; it's just different words. Practice in becoming totally comfortable with communicating on the radio, in the same way as you would on the phone or in your own home for instance, is what this is all about. Once you're comfortable in this way, it's easy and quick to learn what to say in each situation, in each country.