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Last Updated: Tuesday May 18 2010 06:36 GMT

New rules for flying through ash

Plane taking off

New rules mean that more planes are being allowed to take off, even though the volcanic ash cloud from Iceland is still drifting around Britain.

Planes will now be allowed to fly through thicker levels of ash than before.

More flights should help the thousands of British passengers, who are stranded abroad, get home.

It's thought ash could damage a plane's engines, but experts now say it's less of a problem than they first thought.

Airlines will need to get special permission before they fly though the cloud to make sure their engines can cope.

The volcano has been causing chaos for travellers since it erupted in April.