21MY Evoque order hold up?

[Grimsby]

My niece lives and works in Lancashire and back in July paid a £249 deposit to reserve a 2021 Evoque SE p300e. Originally the car was supposed to be handed over in October but last Friday the dealer said they were "still waiting for a build slot". I'd previously cautioned against anything based on brand-new tech (particularly from JLR) but she's in love with it and her heart is set. Plenty of rumours going round about emissions (again...) and/or the impact of the Brexit negotiations. Anybody connected with the company know what the problems migbt be this time?