Five programmes this week in which Nicholas Ward-Jackson explores the contemporary art world. To conclude the week, he talks to Georgina Starr as she puts the finishing touches to Tuberama, a special commission for Birmingham's Ikon Gallery. The work features a scaled-down Underground train and a musical commentary that follows the progress of the carriage's fictional characters. Nicholas Ward-Jackson attends the private viewing, a night of equal importance to Starr and to gallery director Elizabeth A MacGregor.