People in Surrey are being reminded to look out for caterpillars of the Oak Processionary Moth which can damage oak trees.

The advice is to keep away from the caterpillars and their nests. Their hairs can cause itching skin rashes and other health problems.

The moth is a tree pest which was accidentally introduced to England. They feed on oak leaves and in large numbers, can severely defoliate trees and leave them vulnerable. The greatest risk period is May to July.

Sightings should be reported to the Forestry Commission using the Tree Alert online form, at forestry.gov.uk/opm1.