Fight to save Britain's ash trees from killer fungus

Millions of Britain's ash trees could be at risk from a deadly fungus that it suspected to have spread to more than 20 sites.

The Chalara fraxinea fungus, which causes Chalara dieback, has already killed 90% of ash trees in Denmark and was recently confirmed in East Anglia.

Experts are warning that a ban on the importation of ash trees from Europe, which is due to begin on Monday, may not be enough to stop an epidemic spreading through Britain's woodland.

Ed Thomas reports.