Harry Clegg is an ex policeman who fights dirty, his mission to track down a crazed prostitute responsible for a string of murders.
Production
Shoestring budget somehow makes London look even grimier
Writing
Dialogue that aged like milk left in a sauna

Director
Lindsay Shonteff
Trivia, insights & behind the scenes
Lindsay Shonteff directed over 30 films and somehow never learned basic continuity; this was his 'polished' period.
Gillian Grant's credited role as 'Suzy the Slag' used the actual word in marketing—British censors were apparently napping in 1970.