Cathy is 19 and lives in derelict houses ... Kevin, 21, shares a dormitory with strangers in a government reception centre ... Pat, 25, sleeps on the floor of a disused factory with down and outs ... John is 17 and a male prostitute ... and Bill and Phoebe, newly married, spend every day looking for odd jobs and anywhere to sleep. When you're young it's still possible to believe that the streets of London are paved with gold. All of them came to the capital expecting a very small miracle-a job and a place to call home. All met disillusion. Harold Williamson and a Man Alive team investigate the growing problem of young hopefuls in London and the pitfalls that can make them destitute-and worse - in a few weeks.