Police increase patrols in south east London after children are approached by men in four separate incidents as schools warn worried parents to tell youngsters to be on their guard Spate of four incidents began when two boys were approached separately by a man in Bromley on April 30 Boy, 11, who is the son of Line of Duty's Sherise Blackman, was asked by a man in a van if he wanted a lift Second incident around same time saw another boy, 8, approached in nearby wooded area of Kelsey Park Third report on Thursday of a male school pupil being followed by a man along a street on the previous day