Nissan's global boss has said Britain's biggest car-maker would have to reconsider its strategy and investment if the UK were to leave the European Union (EU).
Carlos Ghosn, chief executive and chairman of Nissan and Renault, warned that a decision to withdraw would have implications. He told the BBC: "If anything has to change we [would] need to reconsider our strategy and our investments for the future."
He added that he thought the exit scenario unlikely.
Ghosn said Nissan's Sunderland plant was one of the most productive in Europe and said Nissan was "blessed" to own it.
Nissan employs more than 6,500 people n Sunderland.
The news follows the CBI's recent estimate that staying in the EU is worth between 4-5% of UK annual output and, despite the need for reforms, "overwhelmingly" best for business - but reforms are needed.