A number of flights to UK airports have been forced to land or divert following reports of “smoke smells”.
Fire crews were called to a landing at Liverpool ’s John Lennon Airport, but found “no signs of a fire”.
The airport said the smells appeared to be connected with “atmospheric conditions”.
It comes following reports of an “unusual” reddish sky across parts of England, which experts are attributing to the remnants of Hurricane Ophelia dragging in tropical air and dust from the Sahara, as well as debris from forest fires in Portugal and Spain.
The Met Office said: “The same southerly winds that have brought us the current warmth have also drawn dust from the Sahara and smoke from wildfires occurring over northern Iberia (Spain/Portugal) to our latitudes.”
A spokesman for John Lennon Airport said there were three similar “precautionary landings”, following reports of smells in the cockpit of the planes.
Merseyside Fire and Rescue Service said crews were called to the airport at about 07:39 BST and supported airport fire personnel, who boarded a passenger jet.
Airlines British Airways, Easyjet and Auringy have all confirmed that the reports of smells on their flights have been linked to weather conditions.
Flybe said crews aboard a service from Cardiff to Dublin took “precautionary action” when they detected the smell of fumes, but the aircraft was able to land as normal.
An Aurigny service travelling from Guernsey to Bristol had to head back to the Channel Island due to the smell, but was returned to service after checks by engineers.