UCL

According to Prof Lucie Green of UCL, it has been hard to predict this activity with computer models of the Sun because there has been no data on the migration of the magnetic fields towards the poles.

Ralph Wilde, UCL professor of law, also believes there is proof of genocide.

"I think it's really phenomenal. It's amazing to be able to show this. I'm excited," Prof Nigel Field, from UCL, told the BBC.

Dr Sarah Jackson, who works for the UCL Tobacco and Alcohol Research Group and is the lead author of the survey, tells the BBC she thinks "more people are turning to refillable, reusable devices" rather than stopping vaping altogether.

The UCL study looked at survey data on vaping habits in England, Wales and Scotland both before and after the ban was announced.