Im looking into my family history and it urns out my grandmother went to Australia, came back to England and then back again.
I have the return journey from Australia to England in 1959. She went to Australia between 1957-1959, came back via Sydney in 1959 for a 12 months( as said on the form) and went back according to the form Australia was named as preference to living.. so l am assuming she came back in 1960.

( Im using a friends ancestry account)

However l don't know if she separated or divorced from her husband as she has the husband's surname on the returning trip.