You can apply for a UK ETA online.
Applicants need to complete the online application form, provide passport and personal information, and answer travel and eligibility-related questions.
After completing the application, the required application fee must be paid using an available payment method, such as a credit or debit card.
It is recommended to apply at least 3 working days before travelling to the UK, as weekends or public holidays may affect processing times.
In most cases, applicants can check the result by email after submission.
Once approved, the UK ETA is linked to the passport used in the application, so travellers must use the same passport when travelling to the UK.