Theo LeggettInternational Business CorrespondentBBCThe first day of September should have marked the beginning of one of the busiest periods of the year for Jaguar Land Rover. It was a Monday, and the release of new 75 series number plates was expected to trigger a surge in demand. At factories in Solihull and Halewood, as well as at its engine plant in Wolverhampton, staff anticipated that they’d be working flat out.Instead, when the early shift arrived, they were sent home. The production line...