This 35mm screening, which is also being shown on December 23rd, is part of the Cult strand at BFI Southbank. Full details here.
Chicago Reader review:
A 1972 precursor of George Romero's Creepshow: five short stories drawn from William Gaines's horror comics of the 50s. This British production looks handsome enough under Freddie Francis's direction, and for those who say they'd watch Ralph Richardson in anything, well, here's your chance.
Here (and above) is the trailer.