Robert, "Hobson's Choice was based in Lancashire. I agree on his Yorkshire accent sometimes creeping in, like in Spartacus", or James Mason, he was as "guilty", although if we can accept Sean Connery in all his many parts, Bond, spacemen, cowboys, Arabs and a myriad
other parts, all with a scots brogue, just like Finlay Currie in "Fall of the Roman Empire" as one of the Senate, giving a great speech.....
... with a scots accent
As for Music films Vidar, I searched through some catalogues looking for the pop/ rock type music, "The Kids Are Alright- The Who", "To Russia With Elton", "Help", "Hard Days Night", "Yellow Submarine", "Let It Be". I'm positive I saw in Movie Maker ""Concert For Bangladesh",
"Woodstock", "Gimme Shelter" and "Stamping Ground". The only films I could find on Thin Lizzy and Phil Lynott were taken from IMBd,
"The Rocker" 1996 TV movie, "Rush" soundtrack 2013, "Thin Lizzy Outlaw- The Real Phil Lynott" 2006, "Gary Moore & Friends One Night in Dublin" 2005. I'm sure
there are more, but if I ever know of any Thin Lizzy concert films etc someone has for sale, I'll let you know poste haste.