"I'm happy to make people pay up...£ Film producer Trudie Styler talks to Christa D'Souza about life and love with Sting, jokes that backfire and her passion for her latest fundraising project. There are all sorts of ways to spend a sunny summer's day in London. I'm spending this one with Trudie Styler, looking at a picture of a dump site in Equador. "I'll tell you, this one I went to made me dry retch," says Styler, who has just been appointed national ambassador for Unicef UK's End Child Exploitation fundraising appeal...