Junior Young, 19, from Brixton, described by the judge as the "prime mover", was sentenced to four-and-a-half years in a young offenders' institution after admitting the robbery last May, and an incident of dangerous driving. Ian Montague, 19, of Brixton, received a three-and-a-half years. Marlon Bayley, 17, of Brixton, must serve an 18-month detention and training sentence.