Thousands of passengers have had their flights cancelled because of drifting ash from an Icelandic volcano.
Airports affected include Londonderry, Glasgow, Edinburgh, Prestwick, Durham Tees Valley, Newcastle and Carlisle, air traffic services company Nats said.
The UK’s emergency response committee, Cobra, met to discuss the knock-on effects of the ash cloud.
Air traffic management body Eurocontrol said about 500 flights were cancelled across Europe today.
UK air traffic control service Nats said the ash cloud would continue to affect flights from some airports in Scotland and northern England from 1900 BST on Tuesday until 0100 BST on Wednesday.
Transport Secretary Philip Hammond, who led the Cobra talks, said although there would be widespread disruption for Scottish airports, it was unlikely to last long.
“At the moment the model suggests that disruption later in the week is likely to be limited, but of course the weather patterns are changing all the time,” he said.
The Met Office said the ash had reached northern Scotland and would spread across much of the UK by the end of the day.
But forecasters said changing wind patterns made it hard to predict its exact path and concentrations would vary between regions. (BBC)
