A toxic moth is on the loose and residents are being reminded to stay vigilant.

Richmond upon Thames Council is urging people to help stop the spread of the oak processionary moth, which has been spotted in trees in west and south-west London, including Kew Gardens.

The moth's distinctive hairy caterpillars contain toxins which can cause severe allergic reactions, including rashes and breathing problems, if touched.

The insects feed on leaves and produce silken nests on the trunk or branches of oak trees.

Coun Martin Elengorn, Richmond council's cabinet member for environment, said: "While there is no cause for alarm, we are anxious to raise awareness of this problem and call on residents to help us eradicate it. Anyone who spots the larvae or distinctive nests should keep well clear and contact the council immediately.

"We have been working closely with various agencies including the Forestry Commission and the Royal Botanic Gardens at Kew, to remove the caterpillars and make the areas safe."

For advice on how to identify the caterpillar and the nests go to richmond.gov.uk. Anyone who thinks they may have seen the caterpillars should call the council on 08456 122660.