The UK government has raised its terrorism threat level to 'severe,' indicating a 'highly likely' attack, according to the Australian government's Smartraveller. Smartraveller advises travelers to exercise caution in the UK. Intrepid Travel's managing director, Brett Mitchell, stated that the UK remains a popular destination and doesn't expect the threat level to change this. Travelers should stay informed, check Smartraveller, and monitor updates. The UK has strong security services, and the public guidance remains to be alert but not alarmed. Australian-British and Australian-Irish dual citizens must now use their British or Irish passports when entering the UK; they cannot use their Australian passports. These dual citizens will not be able to get an ETA or visa to enter the UK.