Nissan has confirmed it is abandoning plans to build a new model of one of its flagship vehicles at its Sunderland plant, as it warned that uncertainty over Brexit was affecting businesses. The Japanese car manufacturer announced in 2016 it would be making the new version of the X-Trail SUV at the factory in north-east England after receiving unspecified assurances about Brexit from the government, but on Sunday it said it would be produced in Japan. Nissan said it had…