Mind the gap is more than just a warning phrase on the London Underground, it's also the favourite saying of the troglodyte cannibalistic killer in the British horror film Raw Meat. Mind the gap: you could also consider it a warning when it comes to watching cult films, a collective term for those films that hide in the deepest recesses of the mainstream. Unclassifiable and transgressive, these are the beloved bastard children of cinema: guilty pleasures, sentiments of youth or unsung masterpieces adored by fans, freaks and film fetishists. Offscreen has compiled a fine selection of hidden pearls, low-budget rarities and offbeat genre-excursions: from the B-films of the early 60's, the Hollywood-financed productions of the 70's, to the exploitation films of the 80's that provided the grindhouses and video stores of their weekly stock. Some have finally gained their rightful spot in the British film canon, while others still remain hidden in the dark cellar of English production houses, only saved from oblivion by a bevy of cult film aficionados and admirers of superior trash.