Listen to the inflammatory language around immigration, multiculturalism, press freedom – that old notion of British ‘moderation’ has gone for ever

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While British rightwing politics has never been exactly a gentle pursuit, there is a longstanding assumption that its tone and content have limits. Enoch Powell’s “rivers of blood” speech, Oswald Mosley’s embrace of fascism, Keith Joseph’s 1974 speech apparently in favour of eugenics: each of these transgressions was punished and became infamous.

According to believers in this country’s political moderation, the mainstream British right does not make overt appeals to prejudice, encourage political violence, form alliances with the far right, or advocate authoritarianism here or abroad. Unlike in other democracies, such as interwar Germany, our conservatism has always had red lines.