The service will only work with messaging, maps and location apps. O2 says this is because Starlink’s current satellites do not support calls, although the next generation of them will.

Calls made via WhatsApp, which uses data rather than phone signal, may work though. O2 intends to trial this before the service launches to the public.

The satellites will effectively act like “phone masts in the sky”, said Luke Pearce from analyst CCS Insight.

“In today’s world, connectivity is no longer optional,” he said.

“Whether it’s emergency SOS in life-saving situations or keeping a software-defined vehicle online, people now expect constant access.”

Software-defined vehicles can receive over-the-air updates to improve their performance and features, but need internet connections to be able to do so.

“Satellite is the only technology that can truly close the coverage gap across mountains, oceans and rural areas,” Mr Pearce added.