
This image from the Icelandic Coastguard shows an ash cloud from an ash cloud from a volcano eruption under the Eyjafjallajokull glacier. (AFP/Icelandic Coastguard)
NATS added that British weather forecast service the Met Office had indicated that "the volcanic ash cloud from Iceland is moving around and changing shape".
NATS said it was "looking for opportunities when the ash cloud moves sufficiently for us to make some airspace available within Scotland and Northern Ireland, which may enable some domestic flights to operate".
However "it is most unlikely that many flights will operate today and anyone hoping to travel should contact their airline before travelling to the airport", it added.
Britain is one of more than 15 European countries to have introduced flight bans because of the ash cloud.
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NATS said it was "looking for opportunities when the ash cloud moves sufficiently for us to make some airspace available within Scotland and Northern Ireland, which may enable some domestic flights to operate".
However "it is most unlikely that many flights will operate today and anyone hoping to travel should contact their airline before travelling to the airport", it added.
Britain is one of more than 15 European countries to have introduced flight bans because of the ash cloud.
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