"Jaguar Land Rover are also in deep trouble,.."
JLR are not in "deep trouble". Their sales (along with most other volume car manufacturers) have declined globally because, at last, people are buying fewer cars. However, they have just opened a new plant in Slovakia which is the reason why jobs have been lost in Solihull. This decision was taken in 2015 and has nothing to do with China, diesel emissions or Brexit. It may, however, have something to do with the fact the Slovakia was permitted to lavish £120m on JLR to lure them there. Slovakia is a net recipient of EU dosh and the EU sanctioned the State support (which it would not have done if the UK had wanted to spend the equivalent sum supporting the same business). It did so because under the EU's wealth distribution scheme Slovakia is a "needy" area and Solihull is stinking rich. The EU therefore saw it perfectly acceptable to transfer the jobs to Slovakia. That's why the jobs will be lost in the MIdlands.