This video was uploaded to YouTube by ForestryCommission1.
The Peak District National Park Authority is urging the public to remain vigilant when cleaning footwear, clothing and buggies, to avoid the spread of ash dieback.
The Forestry Commission has provided a video to help identify the disease.
People in the Peak District are being asked to notify park authories if they have planted any ash trees in the past six years.
More worrying developments for the future of the ash trees so many people love.