Flights across Europe could potentially be disrupted due to activity at Iceland's largest volcano system.
Strong seismic activity has been recorded at Iceland's Bardarbunga volcano for the past few days, leading to the country's Met Office raising the risk level to the aviation industry to orange – the second highest level.
Hundreds of UK flights were disrupted in 2010 when the island's Eyjafjallajokull volcano erupted, producing a large ash cloud over European airspace.
Though there are currently no signs of an eruption, Iceland's police and civil protection service have closed roads and begun evacuating highland areas north of the volcano as a precaution.
Met Office seismologist Martin Hensch said, should the volcano erupt, the severity of any disruption caused would depend on a number of factors including how high any ash would be thrown.
He added that flood waves from an eruption beneath the Vatnajokull glacier would pose the biggest risk to Iceland.
