If you brief yourself correctly upon entering UK airspace,
Which you shouldn't have to do, clearly I am not the only one who is thoroughly fed up with NATS parochial outlook, expecting crews to change RT just because they have flown into our little island is ridiculous. 90% of the foreign crews who you hear being told "when established descend ILS" respond with "cleared ILS" without further challenge anyway. UK ATC used to be a pleasure to use but to be honest nowadays I can't wait to get away from it and don't look forward to coming back.