The aerospace company wants to develop a new version of its twin-engined aircraft that could fly the 10,560 miles from London to Sydney.

Currently journeys that long are economically unfeasible because it is so expensive to carry the fuel needed. The more fuel a plane carries the heavier it becomes and conversely the extra fuel it needs to travel further becomes exponential.

Aircrafts making the journey currently stop to refuel in Asia, usually in Dubai.

Boeing is planning to develop a more efficient 777 by 2020.

The practical upshot for passengers is that journey times to Oceania would drop from around 24 hours to 19.

The first non-stop flight between London and Sydney happened in 1989 when Qantas flew a 747 as a publicity stunt.

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