"Kings of Rock n' Roll" repeated on BBC4 again tonight.  I'm watching it now.  I'm not expecting a Beatles reference but a picture of John Lennon with Chuck Berry did pop up a few minutes ago.

PS And a bit later on Paul McCartney remembers Little Richard saying to him "Paul, I taught you everything you know" and Paul kinda agreed.  At the end of the programme with the "Kings" in decline for one reason or another the rock n' roll mantle was taken up by the ... Beatles.