The government has introduced new legislation controlling the movement of oak trees in south-east England due to a rise in the numbers of a toxic, invasive moth species.
The oak processionary moth was first spotted in Kew Gardens, in south-west London, in 2006 after the eggs were imported on an oak from Europe. The insects, whose caterpillars produce tiny hairs that can cause allergic reactions in humans, feed on the leaves of oak trees.
