Yes I have done youth work in London and met these children. Children with 100 year old eyes, a bitter sadness in their faces. My most moving movement was with a very difficult little boy who spat and swore all the time, would not sit down or look me in the face. He had no self-esteem. I got him doing jigsaw puzzles and while he concentrated, we chatted. On my last day he gave me a note. 'I love you, miss.' I gave him a hug and I swear he didn't want to let go. Broke my heart.