Family address in 1911 is 15 Solander Street, Shadwell
Sadie can be found in the Electoral Rolls from 1934
London, England, Electoral Registers, 1832-1965:
Sadie Pooner
Year: 1934
County or Borough: Tower Hamlets
Ward or Division/Constituency: Stepney
Address: 15 Solander Street. Also listed at that address is, Isaac and Eva Itzkovitch.
In 1935 same details, except there is an Alexander Pooner at the address.
Alexander is still there with Sadie in 1936 but he is not there in 1938.
Alexander may be the same person as 'Alec', found by Val in the previous post.
Geoff