Two girls have created a piece of art out of old milk bottles to highlight the dangers of single use plastics.

The ‘pop-up’ art installation, now in place along the sea wall at Severn Beach, consists of a flock of birds flying north up the river.

Each bird is made out of a four pint plastic milk bottle.

The artwork has been produced by 11-year-old twins Rebecca and Elizabeth, who are the grandchildren of Thornbury Art Club member Tricia Latham.

Rebecca and Elizabeth next to their artwork in Severn Beach

Rebecca and Elizabeth next to their artwork in Severn Beach

It is intended to carry a message about the impact of plastic pollution on bird life.