Rare John Byrne painting of The Beatles sells for more than £27,000

“This was a reference and reaction to the fact that Portal attracted a star-studded clientele, with some of the biggest names in British showbusiness at the time becoming frequent visitors. Clients included; Julie Christie, Michael Caine, David Niven, David Bailey, The Beatles – particularly Ringo Starr who is thought to own ‘Patrick’ paintings – and Brian Epstein.