Nearly 20 years ago, amateur actor Mark Blanco fell to his death from a balcony at a gathering in East London attended by The Libertines frontman Pete Doherty. The mystery of what happened that night remains unresolved but Doherty has always denied involvement. Now, Channel 4 News can reveal that Mark’s mother, Sheila Blanco, has today met with a new police force, City of London, to explore whether a fresh investigation into his death could be launched. In her only TV interview, Sheila says she