I'll take that bet.
That price you quote must before the grant ( since you cant have an after grant price of 49K due to the 50K cap)
the current M3 LR before grant is £49990 So you think it will be £990 less than the M3 is now? seems unlikely
Model Y will be made in Berlin with gigacastings. I think they will try to keep the price below 50k. Will probably lower model 3 price to reflect that as well.
Does anyone know if the destination and documentation fee will remain the same with shipping from Berlin and Brexit?