Missing Serena Alexander-Benson, 13, believed to be in Poland

A missing girl who failed to turn up to school in Wimbledon on Friday has travelled to Poland, police believe.Serena Alexander-Benson, 13, told her father she was going to school when she left their south-west London home at 7.50am on Friday.In a statement, the Metropolitan Police said: "Active lines of inquiry are being pursued by officers, working with the National Crime Agency and the Polish authorities.