I have posted several replies but I think they must be as personal replies, I do not know how to post a reply and thank you to everyone rather than individually, I am not convinced that George Augustus Hayles and Peter Augustus Clayton are one and the same person, although he did arrive in Australia in 1918. This Hayles family, of which there a few branches, all called their children by the same forenames, there are two Henry Roberts both born in 1896 and I am having difficulty deciding which is which from the army records. Hope this helps.
Regards, Lydia