A Downing Street spokesperson said:
The Prime Minister spoke to Prime Minister-elect Jacinda Ardern of New Zealand today and extended her warm congratulations on the election result.
They agreed to work together to build on the close and historic partnership between our two countries, including on trade as the UK prepares to leave the EU.
They also agreed on the importance of our cooperation on security and counter-terrorism, as well as our intelligence-sharing partnership under the Five Eyes alliance. They committed to continuing this collaboration in the face of global challenges, such as the growing threat from North Korea.
They ended by saying they hoped to meet at the earliest opportunity.