We know that at least one person from Lotus does periodically look here. Is there a particular reason they won't comment on when the 400 will come?
I don't think the devaluation of the GPB will affect car prices - and this has been a topic in another thread - any more than currency fluctuations normally do. It seems that such changes affect the profitability of the manufacturer to a much greater degree than the price of the car. You only need to look at the prices quoted on the home country sites of various manufacturers, e.g., MB, BMW, etc., to see that if you converted those prices to US dollars, the prices would vary dramatically. For example, if you look at a 400 in France, the price in US dollars is around $115,000; in the UK, it's $100k today, and was $116k two weeks ago. Similarly, a Mercedes GLC SUV, similarly equipped, looks like around $67K US, and in Germany, around $67k Euros (these are prices without VAT), but that's closer to $75US. I think the manufacturers pick out the price point they want to sell cars at in various markets, and generally absord the fluctuation.
This may well be different, because it's large move over a short period of time, and Lotus is a lot smaller, but they may also be able to wait-and-see for a few months, before any major adjustments. In any event, I don't think we're going to see the 400 suddenly cost 10% less. If Brexit causes prices for goods imported to the UK to go up, the cost of the 400 might just as well go up, as opposed to down.