Lauren Child, best-selling author of Charlie and Lola, is working with UNESCO to help the world's street children. | | A year after his death, a marathon seminar celebrates broadcaster and pop mogul Tony Wilson. A groundbreaking new hydrogen scheme in Shetland could help solve the world's oil crisis. Bristolian trip-hop pioneer Tricky is back home with his first album in five years. The TV presenter and comedienne Ruby Wax is Weekend's agony aunt. | | Broadcaster Mariella Frostrup submits to a little light therapy. What fashionable hounds and their owners will wear this season. The Quite Interesting column looks at things which begin with the letter R. |