Stephen Odell, chairman and chief executive of Ford of Europe, said: "The proposed restructuring of our European manufacturing operations is a fundamental part of our plan to strengthen Ford's business in Europe and to return to profitable growth."
Mr Odell will meet personally with union officials to give them the news.
Ford employs around 11,400 workers in the UK at plants including Dagenham in Essex, Halewood on Merseyside and Bridgend in South Wales.
Unite assistant general secretary Tony Burke said: "This is a very worrying time for the UK workforce. Unite is currently working hard alongside its European colleagues to get clarity about Ford's plans but the union will not be adding to the current speculation."