The Met Office has been in "close contact" with Iceland's Meterological Office, after it issued a red alert for the country's Bardabunga volcano which began erupting today. A spokeswoman said:
We are in close contact with the Icelandic Met Office, but currently they tell us that the eruptions are sub-glacial, so no ash has made it to the surface.
If ash does make it to the surface, we will run our model which will indicate where any ash would go, and we will inform the CAA and Nats. They will then make the decision on how that will affect any air flights.
Aviation chiefs are confident that the UK is much better prepared to deal with a potential ash cloud crisis than it was four years ago.
Volcanic ash can adversely affect aircraft in a number of ways. Jet aircraft engines in particular are susceptible to damage from volcanic ash.
That's why there are comprehensive safety arrangements in place. As a result of the work that has been undertaken since the 2010 ash crisis and arrangements that have been put in place since, we are confident that high levels of public safety can be maintained, while minimising disruption.
Aviation authorities in the UK are closely monitoring the fall out from a volcanic eruption in Iceland, where planes have been put on high alert.
UK's air traffic control organisation said that it will help determine what impact the eruption will have for operations in UK airspace, advising airline customers accordingly.
NATS is monitoring the situation and working in close collaboration with the Met Office, Department for Transport and our safety regulator, the Civil Aviation Authority, as this dynamic situation develops further.
A small lava-eruption has been detected under the Dyngjujökull glacier.
The Icelandic Coast Guard airplane TF-SIF is flying over the area with representatives from the Civil Protection and experts from the Icelandic Met Office and the Institute of Earth Sciences. Data from the equipment on board is expected later today.
Data from radars and web-cameras is being received, showing no signs of changes at the surface.
The estimate is that 150-400 metres of ice is above the area.
The aviation colour code for the Bárðarbunga volcano has been changed from orange to red.
At around 2pm local time (3.04pm GMT), an earthquake occurred, estimated 4.5 in magnitude.
The amount of ash produced by the Bardarbunga volcano would depend on the thickness of the ice, Icelandic Met Office vulcanologist Melissa Pfeffer has said, after Iceland raised its aviation alert to red.
Seismologists say magma is moving under the glacier but so far has travelled horizontally at a depth of three to six miles. The volcano will erupt if the magma rises and melts the ice above.
The thicker the ice, the more water there is, the more explosive it will be and the more ash-rich the eruption will be.
– Melissa Pfeffer, Icelandic Met Office vulcanologist