Jonah, asking questions like "What's the point of adding SR.N4 in to Dover-Calais in one environment?" is a total blasphemy, because SR.N4 is one of the symbols of Dover-Calais crossings (in one environment, of course)!
Well said!
SR.N4 has a good claim to be a player ship anyway, regardless of the Dover/Calais environment.
It's got great historical value
It's the largest commercial hovercraft in the world
and it's just the right kind of different, and helps to diversify Ship Simulator.
It's a shame I never got to go on SR.N4, or even see it in action. I think they should be restored into full working order and kept running, even if only by charitable donations.