A book worth reading, if you can get a hold of it, is Guttersnipe by Sam Shaw. Amazing detail of daily life at Feltham Industrial School, followed by his immersion into a Welsh world on a farm in West Wales.
This was the history of my great grandfather, Frank Eldred. Taken off the street in 1890, and on the census return in Feltham industrial school in 1891. His discharge recorded show the details of the farms he was sent to in West Wales in 1894, with an assessment of how he was getting on. These records I got from London Archives.
He settled in the Welsh speaking village where my grandad , my dad and I were all raised (as Welsh speakers). My dad told me that his grandad could speak Welsh albeit with a ‘Cockney’ accent.
There were agents in this part of Wales (Carmarthenshire). That’s how many boys from Feltham ended up here. My friends Greatgrandad , Harry Dalton, had the same story 10 years earlier.