In a significant policy update, Qatar nationals planning to travel to the United Kingdom will now be required to obtain an Electronic Travel Authorization (ETA) prior to their departure. 

Following the submission of the ETA application, a processing fee will be levied, and applicants can expect to receive a response within a reasonable timeframe. Approved ETAs will be electronically linked to the traveller's passport, eliminating the need for physical documents or paper-based visas.

Update: As of now the ETA requirement applies to nationals of Qatar, Bahrain, Jordan, Kuwait, Oman, Saudi Arabia and UAE. More countries are to follow. Individuals with dual citizenship, including citizens holding a passport from another eligible country, will not be exempted and will still need to obtain an ETA. 

Passengers must apply for an ETA before travelling to the UK. If the outcome of their ETA application has not been decided before their departure date, they can still travel to the UK pending a decision.