From 8 January 2025, Australian passport holders entering the UK, will need an Electronic Travel Authorisation (ETA).
The UK ETA must be applied for and completed online, and application approved before boarding a flight to the UK.
The ETA applications will be live as of 27 November 2024 and will cost GBP10, paid via credit card at the time of application.
Other passport holders should seek advice to confirm what visa requirements are for entering the UK.
For more information please refer to UK Government ETA website or Smartraveller.