A century of "intrusive" R in English

As these clips show, so-called intrusive R has been a feature of standard speech in England (and presumably Wales, Australia and New Zealand) for at least a century. The term refers to a linking /r/ sound between the vowels of THOUGHT, PALM and commA and a following vowel, IF there’s no corresponding ’r’ in the spelling. 00:00 Intro 01:57 2020s 02:18 2010s 02:38 2000s 03:02 1990s 03:23 1980s 03:43 1970s 04:07 1960s 04:28 1950s 04:50 1940s 05:17 1930s 05:43 1920s Russian oil imports Vaccines Royal Institution Brexit statement David Bowie Nokia Gadget Show Diana Vanilla Ice John Hurt Ford ad Hamlet 1980 Grease Film 78 https://y