English air space restrictions are to remain in place until 01.00 tomorrow, the National Air Traffic Service said this morning.
A further review of the situation will be made at 13.30 today.
The cloud of volcanic ash continues to cover much of the UK and the eruption in Iceland continues, NATS said.
"Following a review of the latest Met Office information, NATS advises that restrictions preventing flights in English controlled airspace will remain in place until 01.00 (UK time) tomorrow, Saturday 17 April, at the earliest," a statement said.
Flights in Northern Ireland and the Western Isles of Scotland to and from Glasgow and Prestwick will continue to be allowed until 19.00 subject to individual co-ordination.
North Atlantic traffic to and from Glasgow, Prestwick and Belfast may also be allowed in this period.
From 19.00, forecasts indicate that Scottish airspace may be able to accept domestic flights within Scotland and Northern/Southern Ireland, and North Atlantic flights to/from airports in Scotland and Northern Ireland.
"We will review further Met Office information and at 13.30 we will advise further arrangements. In general, the situation is dynamic and subject to change," NATS said.
"We continue to work closely with airports, airlines, and the rest of Europe to understand and mitigate the implications of the volcanic eruption."
*See linked story on impact to flights.
by Phil Davies
