Aviation regulators said airspace over Scotland and Northern Ireland will close from 7:00 am Wednesday due to dangers posed by ash from an Icelandic volcano, Frans Press reported.
They also warned the ash cloud may float further south and close airports in other parts of Britain.
"Forecasts show that levels of ash in the atmosphere over Scotland and Northern Ireland will exceed the concentrations that engine manufacturers have agreed are safe for operations," said Britain's Civil Aviation Authority (CAA) in a statement Tuesday.
"Unfortunately, this means that the CAA anticipates all Scottish and Northern Ireland airports will be closed from 07:00 local time tomorrow."
The CAA gave no indication when the airspace might reopen.
"The UK Met Office (weather forecasting service) has informed the CAA that ash over UK airspace has increased in density as ash emissions from the Icelandic volcano... have become stronger," said the statement.
"The forecasts also show that it is likely that the ash cloud will continue to move south, potentially affecting airports in the northwest of England and North Wales" on Wednesday, it said.
It advised passengers to check airlines to see whether their flights were running.
...