Wrong adverts

I’m not sure why this comic destined to be distributed in the UK has Australian adverts? Was it an error or are there more instances? I possess a dozen other (admittedly earlier) UK copies of this title and the ones with adverts have UK addresses, often for Charles Atlas courses or similar.

Would a child in the UK sending the coupon to Dubbo, New South Wales Australia get anything back? If they did at least the envelope would have another interesting stamp on it!

Superman in Australia began a couple of years earlier than the UK reprints, so had different numbering and mostly different pricing. Our May 1959 Superman 109 had the same number of pages/contents as Australia’s April 1959 number 141 which cost twice the price down under.

PS: The fact that the final UK Superman issue was published in January 1960 might mean that although DC reprint comics continued in Australia for many years K G Murray were no longer able to distribute their variants in the UK as Thorpe and Porter were now sole-importer of the real things??