Marsh Fritillary butterfly numbers have more than doubled at Lydlinch Common during an annual survey

A record number of one of the UK’s rarest butterflies has been found at a nature site.

More than double the number of silk shelters were found at Lydlinch Common this year compared to last year, according an annual survey by Wareham based national charity Butterfly Conservation.

The Marsh Fritillary butterfly was once widespread across the UK but has plummeted over the last 100 years due to changes in farming practices wiping out its habitat.