Hundreds of people are expected to gather for an open-air premiere of a community film project about the River Wandle.

The Heritage Lottery-funded film, Vandalis, has been written and performed by Merton residents using locations around the river Wandle.

After several weeks of cutting and editing, Vandalis, the Latin name for the Wandle used in the past by poets, is ready for its launch on Saturday at Merton Abbey Mills.

Starting with scenes of a prehistoric settlement, the film tells the story of the river's history through the industrial revolution to the present day.

Director Peter Wallder, who runs the Colour House Theatre in Merton Abbey Mills, said: "It's the first time the River Wandle has ever been seen this way.

"It's an emotional drama that will move you and also give you an experience through film about one of the most important rivers that we live by."

The film screening will close the Living Wandle Festival, which takes place from noon until 5pm on Saturday, September 27.

The 10 Living Wandle partners and friends will have stalls in the market place offering activities and information about the 19 Wandle projects and how you can get involved.

There will also be a free prize raffle with prizes such as restaurant meals and a Sambrooks brewery tour.

Vandalis; Merton Abbey Mills, Merantun Way, Colliers Wood; Saturday, September 27; 8pm outdoors or 7pm indoors if the weather is bad; free; LivingWandle@wandsworth.gov.uk; 07500 073 049.