Adoption and My Granpa

My maternal granpa Peter Wright was born in Wandsworth in 1922. His mum apparently pregnant 'out-of-wedlock', he was born in the house of Dorothy Cooper, who later adopted him. They moved to Sussex where the family included a stream of fostered and adopted children, and where he lived for the rest of his life. In the 1911 census his mum (my maternal great-grandmother) Clara Wright (14), is living with her parents William (37) and Clara (37), brothers Frank (9) and Frederick (3), and sister Ida (7). The family were poor and lived in South London; the census shows that Clara gave birth to 2 children who later died.  Her father was a bricklayer and possibly Jewish. The area where Clara's family lived, and where my grandfather was born, is now high-rise flats.