Council warning over spring outbreak of toxic moth larvae

London could be hit by an outbreak of toxic moth larvae.

Richmond council is warning people to look out for the caterpillars of oak processionary moths, which are usually found in southern and central Europe.

Their hairs contain a powerful toxin that can cause rashes, conjunctivitis, sore throats and breathing problems.

The hairs, known as setae, can spread by wind and affect people up to 20 metres away. Larvae of the moth have been found on oaks in Richmond over the past two summers. The council is advising people to look out for the hairy caterpillars, which appear in late April, but not to disturb their nests.

Martin Elengorn, cabinet member for environment, said: "With the arrival of spring, we are stepping up efforts to control the spread of this pest and working in partnership with the Forestry Commission, the Royal Botanic Gardens and Ealing. While there is no cause for alarm, the caterpillars can cause unpleasant symptoms in anyone who comes into contact with their hairs."

The caterpillars, named after their habit of forming processions, feed on oak leaves.