Lee has no documentation to prove who he is. He doesn't have a birth certificate. He doesn't have a national insurance number. He has never had a passport, or a bank account. He has never been registered with a doctor, and he has never been on the electoral roll. There is nothing to prove he is who he says he is - 68-year-old Jim Lee from London.

For years, it didn't matter. It never crossed his mind that he could be a non-person. He had managed to get through much of his childhood and all of his adult years working outside the system, earning just enough to see himself right. But then he reached his late 60s and discovered people weren't giving him work any more, telling him that he was too old. He ran out of money, ran into trouble, and decided to visit a benefits office for the first time in his life. And that's when everything went wrong.