The Vanuatu Daily Post reports Napat met with the British High Commissioner Nicolette Brent in Port Vila "to seek justifiable explanation on the decision".
Napat said the Vanuatu government had been actively working to bring in the necessary reforms to its citizenship program to meet requirements set by the European Union.
The UK is no longer in the EU. However, the EU Council last year also decided to remove Vanuatu's visa-free-access to EU countries, a decision that came into effect on February 4 this year.
