UK ETA Mandatory for Travel Starting Today

The UK's Electronic Travel Authorisation (ETA) becomes required today for non-visa nationals visiting for up to six months. Nationals from 85 countries, like the US and Australia, apply online for £16, gaining two-year multiple-entry permission linked to their passport. Most receive instant approval via app, though three days buffer advised. Airlines block boarding without it, enhancing digital border efficiency. Exemptions cover British, Irish citizens, and certain transits.