He was then asked why the referenda wouldn't be held the other way around. "If I say to New Zealanders 'do you want to change the flag?' half of the country will say 'yes', but unless you can actually show them what the alternative looks like, you can't be sure.
Lots of countries change their flags but you've got to know what you're changing to."
He says he believes the flag should include the silver fern. Unlike the proposal to change the flag, he does not believe the national anthem will be changed, saying it was an issue of less importance.
"The flag is more about national identity, national pride and patriotism - it is much more on display than the national anthem."
He told students that being away from family was the hardest part of being Prime Minster, that his mother inspired him and that he had had to get used to people not liking him.