Eileen Elizabeth Sheridan was known for her association with a firm headed by  English gangsters who were the foremost perpetrators of what in the East End of London?
Kray twins Twin brothers Ronald "Ronnie" Kray (24 October 193317 March 1995) and Reginald "Reggie" Kray (24 October 19331 October 2000) were English gangsters who were the foremost perpetrators of organised crime in the East End of London during the 1950s and 1960s. With their gang, the Firm, the Krays were involved in armed robberies, arson, protection rackets, assaults and the murders of Jack "the Hat" McVitie and George Cornell.
John Martin Scripps John Martin (born John Martin Scripps, 9 December 1959 – 19 April 1996) was an English spree killer who murdered three tourists—Gerard Lowe in Singapore, and Sheila and Darin Damude in Thailand—with another three unconfirmed victims. He posed as a tourist himself when committing the murders, for which British tabloids nicknamed him "the tourist from Hell". He cut up all his victims' bodies, using butchery skills he had acquired in prison, before disposing of them.