Job losses through the expected closure of the Ford Transit van factory in Southampton are set to be voluntary, according to sources.
Union leaders were locked in a meeting with the company to hear details of the future of the plant, which employs more than 500 workers.
Union officials said it was a "very worrying time" for the employees at the site, which has been making Transit vans since 1972.
It follows news that a plant in Degenham could also close, with a combined loss of 1,500 jobs.
Ford is to close its Transit van factory in Southampton and a plant in Dagenham, Essex, with the loss of up to 1,500 jobs, sources have told the Press Association.
ITV Daybreak's Chief Correspondent Richard Gaisford has been speaking to workers at the Ford factory in Southampton as they await news on the possible closure of the site.
The potential loss of 500 jobs comes as official figures are expected to confirm that the UK economy has pulled out of recession.
VIDEO: The Meridian Tonight item on the expected closure of the Ford Factory in Southampton.
Unite, which represents most of the employees at Ford's Southampton plant, has said it is a "very worrying time" for workers. "We are currently working hard to get clarity about Ford's plans." The union refused to comment any further ahead of tomorrow's announcement about the plant's future.
VIDEO: Caroline Nokes, the Conservative MP for Romsey and Southampton North, is worried about the effect on people in her constituency.
VIDEO: Amanda Piper and Sally Simmonds have the latest on the possible closure of the Ford factory in Southampton.