One can legitimately ask Sid James's work in the Carry On films counts as "English," which was Lizzie's original claim. James was in a series of English films, directed at an English audience, in which he played English characters. Certainly in many other countries, if an immigrant was so fully adopted into a country's cultural scene, especially from one of that country's former colonies, his work would count as part of that country's culture.

Particularly since hardly any of his viewers would have realized he was from anywhere else. It had never occurred to me before this thread that he was anything other than a native Englishman with a Protestant background.

We don't often get to find out the ethnic background of British Jews in public life until we read it in their obituaries (or similar - I didn't realize Malcolm Rifkind was Jewish until he lost his seat and some journo wrote a political obit for him).