Boeing's Starliner spacecraft has completed its journey back to Earth - but the astronauts it was supposed to be carrying remain behind on the International Space Station. The empty craft travelled in autonomous mode after undocking from the orbiting lab.

Boeing’s Starliner capsule is in the midst of its inaugural crew flight test (CFT) but will complete its mission autonomously.

Nasa confirmed tensions with Boeing over returning astronauts Butch Wilmore and Sunita Williams from the ISS due to Starliner capsule malfunctions. De