Charities, community groups and individuals were encouraged to plant trees in the run up to the celebrations this summer.

The Woodland Trust alone planted three million saplings, while organisations funded by the Government’s Big Tree Plant have planted almost 300,000 during the tree-planting season from November to March.

Around ten per cent of the trees were ash, which are often imported from Europe.

The Woodland Trust said they could not be sure if any of the ash trees planted for the summer were imported, since nurseries do not label if saplings have been “grown on” abroad.

The charity said all the sites planted this summer have been cleared for ash dieback and in future only trees sourced and grown in the UK will be planted. Just seven trees, that were traced back to an infected nursery were destroyed.