"Jaguar Land Rover to close down for a week in April to adjust production, "" Because of BREXIT."" OK!."
No it's not OK. What, pray tell, has that to do with the 4,500 job losses that you mentioned earlier. You start by mentioning one thing that you ascribe to Brexit (which clearly is nothing to do with it). When challenged you mention something completely different.
Since you did mention something else it's worth addressing. Jaguar Land Rover has been poorly managed for ages and is suffering from the diesel fiasco and declining demand in China. It had already planned a ten day shutdown in April for maintenance. It is beginning that closure earlier for, what is says, is "Brexit uncertainty". It is not certain whether (a) the UK will leave the UK on 29th March; (b) if it does whether it will leave without a "deal"; (c) if it leaves without a deal whether there will be any immediate effects (as immediately as early April that is). JLR is in some trouble and explaining their decision to close for an extra few days in April due, as they say, to Brexit, is stretching their credibility.