Authorised Economic Operator (AEO) status is, in HMRC’s words, “an internationally recognised quality mark that shows your business’s role in the international supply chain is secure and has customs control procedures that meet Authorised Economic Operator standards and criteria”.
New Zealand has now been added to the list of countries that the UK has negotiated a mutual recognition agreement with for businesses that have AEO Security and Safety status.
https://www.gov.uk/guidance/authorised-economic-operator-certification