HI Everyone.
Thanks for all the detective work.
Just to add, Joseph and family were in Teddington in April !931 as thats when my Dad was born. The Chadwell Heath address and his occupation are from his eldest son's death certificate in January 1930.
Sometime in the early 30's they moved to Wimbledon, then Croydon. But, as the photo is 1930, this doesn't make much difference.
Thanks again.
Barry