Just following a wonderful site - Find Russian Heritage and found the following in their latest information on Russians who are buried in Sydney, Australia. There are approx. 300 graves and here is the one that caught my eye.
Konstantin Afans. Davidoff , Tomsk University, born Irkutsk, died 1953 [born 1 July 1913, arrived to Fremantle on 27 September 1938]
How your family get around. Perhaps Konstantin left UK for Australia in 1938. You could do some research on this yourself.
Good luck again.
mj7777