FT941-10127 _AN-EBKCTAAFFT 940211 FT 11 FEB 94 / World News in Brief: Man charged with policeman's murder A 31-year-old man was charged with the murder of Police Sergeant Derek Robertson who was stabbed to death trying to prevent a post office robbery in Croydon, south London. The man was also charged, with two others, with attempted robbery. Countries:- GBZ United Kingdom, EC. Industries:- P9229 Public Order and Safety, NEC. Types:- PEOP People. The Financial Times London Page 1