A joint letter signed by 15 countries across the European Union - including Poland, Sweden and Greece - puts forward their concerns that the “anti-5G movement” is gathering momentum across Europe.

Conspiracies over the introduction of 5G networks have been gaining traction on social media platforms in recent months. They even include theories that the coronavirus epidemic could be linked to the new networks in some way.

The proliferation of such theories, none of which have any grounding in scientific study, have led to real-world consequences, including repeated arson attacks on 5G mobile phone masts across the UK and the rest of Europe.

An Ofcom survey in April suggested that 5G misinformation had become the most common false information seen by Britons.

Both YouTube and Facebook have been forced to crack down on content promoting the unsubstantiated claims, although the former said it would not remove all content related to it.

“It is clear ... that...