Treacle Jr.

Tom is forty. He walks out one day, rather abruptly, on his wife and baby boy and his seemingly happy life. He finds himself living on the streets of London. One night alone in a park he is mistaken for a gay man and is set upon by a gang of violent thugs. In A&E the next day Tom meets Aidan, the happiest, fast-talking individual you are ever likely to meet, the complete opposite of Tom... (imdb)