Speculation is mounting that more than 1,000 jobs at Vauxhall could be axed as part of Canadian parts maker Magna’s restructuring of Opel.
A source close to the talks told BBC News job cuts could be shared between the plants at Luton and Ellesmere Port.
Last week at the Frankfurt Motor Show, Magna’s co-chief executive, Siegfried Wolf, told reporters as many as 10,500 jobs would have to go, with 4,000 of the cuts in Germany.
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Tony Woodley, joint leader of the Unite union, said he had “growing concerns” over Magna’s plans for Vauxhall.
However, a spokesman from the Department for Business, Innovation & Skills, said: “Every aspect of these negotiations is under very active discussion and the government is working to secure the best possible outcome for Vauxhall in the UK.”