PSA owners of Peugeot and Citroen cars has struck a deal of €2.2bn (£1.9bn) to buy General Motors’ European unit including Vauxhall. Loss-making GM Europe has UK factories at Ellesmere Port and Luton which employs 4, 500 people. With GM’s Opel and Vauxhall operations, PSA Group jumps to become the second largest carmaker in…