If you’re travelling outside the EU, you won’t be able to use your UK allowances. If you use your mobile data outside of the EU you will be charged up to £5 per Megabyte, depending on the country you’re in. For more information, including calls and text message charges visit.
Full NZ tariff for monthly contracts
https://store.virginmedia.com/virgin-media-mobile/our-mobile-network/data-roaming-abroad.html
So better off getting a sim at the airport in NZ probably.
