Kate Winslet considers herself a “street urchin” who “got lucky”. The actress, 48, has racked up film credits from ‘Titanic’ to her new film ‘Lee’ and banked an estimated fortune of £71 million, but has now said she thinks she is an “unlikely” success story due to her humble start in life. She told People: “I was kind of a little street urchin who got lucky, really. I’m a very unlikely success story, to be quite honest with you. “I don’t come from money. There isn’t a great pedigree of performers behind me. I wasn’t trained.” Kate was raised with her three sisters in a working-class household …