British citizens can enter New Zealand as tourists for up to six months without obtaining a visa before arrival. However, if they plan to stay in the country for longer or engage in activities such as work, study, or business, they will need to apply for the appropriate visa. There are various visa types available, including work visas, student visas, and business visas, among others. The application process typically involves submitting an online application, providing supporting documentation, and paying the applicable fee. It is recommended that applicants allow sufficient time for their application to be processed, as processing times may vary depending on the type of visa and individual circumstances.