Madam Fonda reads Tom Lamont's article 'The invisible city: how a homeless man built a life underground', published in the Guardian on 5th March 2020.

https://www.theguardian.com/news/2020/mar/05/invisible-city-how-homeless-man-built-life-underground-bunker-hampstead-heath

To read more about the issue of hidden homelessness in Britain, have a look at the articles below:
https://www.bbc.co.uk/news/uk-42464904
https://www.bigissue.com/latest/hidden-homelessness-cold-hard-facts/