One of the world’s most famous volcanoes has erupted violently, producing a rare phenomenon and prompting aviation authorities to raise the travel threat level.

Smartraveller has issued an urgent warning to Australians in the Middle East as military strikes hit Iran and Israel declares a state of emergency over feared ‘terrorist attacks’ and retaliation.

The Buckingham Palace balcony will appear notably emptier than in years past at King Charles’ official birthday celebrations.