Hypersonic space jet could fly from London to Sydney in just THREE hours at 3,800mph as UK prepares test flight

A NEW hypersonic space plane being built by British engineers could fly from London to Sydney in just three hours. The Invictus jet - meaning "unconquered" in Latin - could zoom into space at more than 3,800mph. Flying from London to Sydney usually takes more than 21 hours - but the technology of the Invictus...