Meta won its case in December after a ruling that the spyware company used Pegasus to target "over a thousand" WhatsApp users.

The case caps a six-year battle between the social media giant and the surveillance firm, casting an unusual amount of light on the spyware industry.

The Israeli firm behind the Pegasus spyware has been ordered to pay WhatsApp $167m (£125m) for hacking 1,400 people in 2019. Pegasus is malicious software which can be installed remotely on mobile phones to access, among other things, people's microphones and cameras.