That’s a complex one.
For the sort of people who can afford to buy their beemers, 10% extra possibly won’t sway them not to - especially as the likely competition for their hard earned £s will be predominantly other European marques (Audi, Mercedes etc) which will, presumably also be up 10%.
In fact it will probably be 10% across the board because, as pointed out above, vehicle manufacturing is very much a cross boarder business in the EU these days.
So, chances are that people will either swallow the increase or go down spec/trim levels rather than change brand.
Let’s face it though most people cannot actually afford to buy their beemers (or Mercs or Audis) outright and buy on a modern personal contract hire contract where, essentially, you just pay the depreciation. Assuming that the hike in new car prices also causes a hike in used car prices then the monthly repayments will just go up by 10% - say £350 to £385 which might not be that significant at the end of the day.
I have finally listened to the phone in - wow, all I can say is that is one confused/deluded individual - but it illustrates the point that has been made. People bought into the Leave campaign claim that everything would continue as before, we would just be in control and not paying for it.