Britain and New Zealand will co-host a forum on Pacific climate change issues later this year.
Foreign Minister Winston Peters welcomed the pledge on closer co-operation in the Pacific made by his British counterpart Boris Johnson following talks between the pair in London overnight.
The pair met at the Churchill War Rooms, an underground complex at Westminster where Winston Churchill and his Cabinet directed the course of World War II.
The two foreign ministers discussed a range of issues including future negotiations on a bilateral Free Trade Agreement post-Brexit in March 2019, and Peters reiterated New Zealand's support for the UK following the attack in Salisbury.
Following the meeting, Johnson said the United Kingdom was one of the Pacific's oldest friends and wanted to play an even more valuable role as a partner to Pacific Island countries.