New Zealander or Kiwi. Our sense of being a nation distinct from "Home" as Britain was called really took off after World War One.

While we weren't technically independent, we'd been self-governing since 1865, although it took us a lot longer to cut all of the apron strings, and well, the Queen is still our head of state, so who knows if or when we'll go full republic - most NZers don't really care. But hey, in the 2000s we stopped using the Privy Council in England as our highest court.

http://www.firstworldwar.tki.org.nz/assets/Uploads/Images/Y5...

According to a gov.nz site

"In 1948 New Zealanders became New Zealand citizens – before that they had been British citizens."

So Hillary would have been a British citizen most of his life and possibly acquired a liking for marmalade while in that state.

To add to that it was only a few years earlier, 1947 (vs 1953) that NZ ratified the law allowing their further independence from Britain. Wikipedia claims that into the 70s many in NZ considered themselves to be part of a British colony.

Also the expedition was the "British Mount Everest expedition". I think it's fair to include marmalade being in Hillary's supplies as being indicative of British cultural adoration of marmalade. Hillary's grandparents were from Yorkshire, UK.

Apparently Hillary, as his father and brother, was a beekeeper; I wonder if he took honey too.