Iceland has downgraded its volcano alert level back to orange after declaring a small eruption which started overnight was not a threat to air travel.
A minor eruption was reported at the Bardarbunga volcano after more than a week of rumblings and earthquakes in the region, prompting the country's Met Office to issue a red alert.
Steam and ash were seen rising from the 1km-long fissure in the lava field north of the Vatnajokull glacier, which covers part of Bardarbunga - Iceland's biggest volcano system.
Experts say the amount is too small to cause aviation problems, but say a restricted flight zone covering a radius of three nautical miles and an altitude of 5,000 feet remains in force.
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Some children, particularly those who have been more directly affected, may show symptoms of stress and trauma.
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The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.