An image made available by NEODASS/University of Dundee which shows the volcanic ash plume from Iceland, top left, to the north of Britain as received by NASA's Terra Satellite at 11.39 GMT Thursday April 15, 2010. All flights in and out of the UK and several other European countries have been suspended as ash from a volcanic eruption in Iceland moves south.
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The UK government has designated an area around the Chagos Islands as the world's largest marine reserve. The reserve would cover a 544,000 sq km area around the Indian Ocean archipelago, regarded as one of the world's richest marine ecosystems.