PARIS (Reuters) - Britain has given Nissan (>> Nissan Motor Co Ltd) a written commitment of extra support in the event that Brexit reduces the competitiveness of its Sunderland plant, in return for new production investments by the Japanese carmaker, a source with knowledge of the matter told Reuters.

In addition to unconditional investment aid, Britain pledged in a letter to offer further relief if the terms of Britain's European Union exit ended up harming the plant's performance, the source said.

(Reporting by Laurence Frost; Editing by Kevin Liffey)

Stocks treated in this article : Renault, Nissan Motor Co Ltd