People who rely on social media for information about coronavirus are more likely to believe conspiracy theories and breach lockdown rules, according to a study.

More than one in 20 (8%) think the symptoms that most individuals blame on Covid-19 appear to be connected to 5G network radiation - a false conspiracy that is thought to have motivated a number of mobile mast attacks across the country during lockdown.

Of those who believe this theory, 60 per cent said they get their information from YouTube, compared with 14 per cent who think that it is false.

On Facebook, the number stands at 54 per cent among believers, versus 20 per cent of non-believers.

Among those who believe there is no hard evidence that the virus exists, 56 per cent use Facebook as their key information source, almost three times higher than the proportion of people who do not believe such a thing (20%).

"These sort of associations cannot prove that misinformation on social media platforms causes belief in conspiracies, lower trust and a greater likelihood of breaking the rules, but they point to a toxic mix between underlying beliefs and misleading information that can have real effects on how people behave, even during a pandemic," said Professor Bobby Duffy, director of the Policy Institute at King's College London.

The findings, based on surveys of 2,254 UK residents aged between 16 and 75 carried out by King's College London and Ipsos Mori, also suggest a link between those who have broken lockdown rules and use social media for details about coronavirus as well.

Three in 10 people who wrongly believe that 5G is causing Covid-19 symptoms have gone outside despite suspecting they may have the virus, compared with just 4 per cent among those who reject this belief.

People who admitted going outside with possible symptoms are more than three times as likely as those who have not to get a fair amount or great deal of their information about the virus from YouTube.

Meanwhile, 55 per cent of Facebook-reliant users said they took the risk, compared with 21 per cent who did not.

The results indicate a similar trend among those having friends or family over during lockdown, as well as failing to stick with two-metre distancing rules.

"Our findings suggest that social media use is linked both to false beliefs about Covid-19 and to failure to follow the clear-cut rules of the lockdown," said Dr Daniel Allington, senior lecturer in social and cultural artificial intelligence at King's College London.

"This is not surprising, given that so much of the information on social media is misleading or downright wrong.

"Now that some of the lockdown rules are being relaxed, people will have to make more and more of their own decisions about what is safe or unsafe - which means that access to good-quality information about Covid-19 will be more important than ever.

"It's time for us to think about what action we can take to address this very real problem."

A YouTube spokeswoman said: "We're committed to providing timely and helpful information about Covid-19 during this critical time, including raising authoritative content, reducing the spread of harmful misinformation and showing information panels, using WHO data and the NHS resources, to help combat misinformation.

"We also have clear policies that prohibit videos promoting medically unsubstantiated methods to prevent the coronavirus in place of seeking medical treatment, and we quickly remove videos violating these policies when flagged to us."

Researchers have published their findings in the Psychological Medicine journal.