This week, we’ll be finding out why the European wine lake is causing trouble for England’s vineyards; the pride of New Zealand, Hayley Westenra, will tell us why she’s singing at the World Cup; we’ll get the latest on conductor Ivor Setterfield’s attempts to turn a bunch of novice singers into a credible choir; and Robert Van Leer, the man who programmes the Mostly Mozart festival at London’s Barbican every year, reveals some of the tricks of his trade.