Unions are striving to protect jobs at two major processing sites amid fears of significant redundancies.
Union leaders remain optimistic about Allied Bakeries' Netherton site in Maidenhead, which employs 150 staff, despite it losing "sizeable" business with Tesco.
John Higgins, organising district secretary for the Bakers Food and Allied Workers Union, said no decision had yet been made on the site's future, and no job cuts had been announced. "Although the contract is a sizeable chunk of the business, we remain confident that Allied Bakeries will be able to find new customers," he added.
Separately, Northern Foods' workers are still trying to save the Fox's Uttoxeter biscuit factory in the East Midlands, said Unite. The union's members and staff gave bosses a petition of over 6,000 signatures in a bid to save jobs. Northern Foods is considering upgrading the plant or building a new £40M plant elsewhere, threatening the prospects of local employees.