This film, introduced by Matthew Sweet, is part of a Cigarette Burns Film Club season at the Barbican Cinema dedicated to the cult director Pete Walker. Full details here.
Barbican introduction: Young Joe Sickles (Robin Askwith) wants more from life, but was never prepared for where Carol (Janet Lynn) was going to take him. Walker's dark comedy showcases the seedier side of Swinging London, as fresh-faced youngsters are chewed up and spat out by the exploitation machine.
Here (and above) is the trailer.