Aveline
They could easily do a whole series and look at how several different families got on and where they are now. Would be fascinating.
There have been films, documentaries, about the orphans sent out to Australia, about the orphanages where some children, including Australian children, were sent, about Aboriginal and Island children removed from their families (the Stolen Generation and happening still recently), about £10 POMS, racial tensions etc.
This series can't hope to cover all the topics, it will merely skim the surface of too many subjects and because of that, it could leave a feeling of dissatisfaction.