Zuckerberg first unveiled his vision for flying wireless internet access points in March last year. The aim of Internet.org is to use solar-powered, internet-beaming aircraft flying over remote communities to connect parts of the global population that don't currently have internet access.

In a Facebook post this morning, Zuckerberg revealed that the Internet.org aircraft have been successfully tested in the UK. Indicating that it is still under development, he says the finished aircraft will have a wingspan greater than a Boeing 737, but still weigh less than a car. It will be capable of flying at an altitude of 60,000 ft (18,288 m) for months at a time.

"Aircraft like these will help connect the whole world because they can affordably serve the 10% of the world's population that live in remote communities without existing internet infrastructure," Zuckerberg writes.