Trees affected by ash dieback
Media playback is unsupported on your device
Video

Ash dieback: How the British landscape is changing

The Forestry Commission is warning that a whole generation of ash trees is likely to die because of the unstoppable spread of the ash dieback disease.

It has been a year since it was first discovered in the UK and now the trees are in leaf, the full impact of the disease is starting to become evident.

Jeremy Cooke reports.

Go to next video: 5,000 Welsh trees need protection