One of the rarest butterflies in the UK has returned to Wales, decades after last being seen in the country.

The endangered Wood White, known for its delicate cream colour and striped antennae, was recorded at four sites in Powys by the Butterfly Conservation, including a female laying eggs.

The species used to have a permanent colony in south-east Wales but died out several decades ago due to a destruction of habitat, with only some "sporadic sightings" since.