"We put a urinal in Wardour Street in Soho and found 60 different drugs in there, " he said.

BBC: Legal high deaths 'tip of iceberg', says doctor

The infamous Marquee Club went through a succession of incarnations around here, when at 90 Wardour Street it hosted Bowie, Hendrix, Led Zeppelin, the Cure, Joy Division and - of course - the Sex Pistols.

BBC: Denmark Street and Soho: London's Tin Pan Alleys