Power banks and vapes are now the biggest safety threat to aircraft, says aviation authority

Air passengers are typically not permitted to fly with more than two power banks - (Getty Images/iStockphoto)

The fire risk posed by lithium batteries is now the number one safety risk to aircraft, according to the UK Civil Aviation Authority (CAA).

Millions of air passengers have been warned to take portable chargers and vapes into the cabin rather than the hold, as around two lithium-battery-related incidents a week disrupt flights.