Unilever's plans will be bad news for Wales where 650 jobs across three different plants could be lost or transferred.
But there is better news in Merseyside. 150 new jobs will be created as part of the firm's plans to create its biggest UK factory.
The Unite union, which represents some of Unilever’s staff, says it is considering the impact of today's announcement from the consumer goods giant.
The firm's announcement to invest £40 million in its biggest UK factory in Wirral, Merseyside, will lead to hundreds of job losses.
The union will be meeting with senior management later this month and say its main concern is to ensure there are no compulsory redundancies.
Consumer goods giant Unilever is proposing to close a number of sites with the loss of up to 800 jobs, while investing £40 million in its biggest UK factory, the firm announced today.
The plans involve the closure of factories in Swansea and Slough and a distribution site in Bridgend, while an office Ewloe, North Wales would also close and work be transferred.
The proposals include investment of £40 million in Unilever's "historic home" of Port Sunlight, Wirral on Merseyside, with the creation of 150 new jobs.
Work would transfer from Ewloe to Port Sunlight, where the workforce would increase from the current 1,500 to 2,000.