The cost of getting documentation in order varies. Non-dual nationals travelling to the UK need only an Electronic Travel Authorisation (ETA), which costs £16 (about $36). Dual nationals without a British passport, however, must apply for one at £94.50 (about $213), or alternatively obtain a Certificate of Entitlement (COE) at £589 (about $1,330). The COE is now digital and carries over to subsequent NZ passports.
