As part of the Eurostar route is underground (under the sea, obviously) and the HS1 highspeed line in England is already built with the newly added SEHS line, would a Eurostar highspeed line be buildable ? It would be an awesome addition to the game !
Just asked the devs in a stream and there aren't any licensing issues, they just haven't got the license currently but could get it if Eurostar accepted.
Oh yes. The whole journey. From London St Pancras International to Paris Gare Du Nord. Including the 373 Eurostar. Especially to Brussels Midi with Thalys and TGV Reseau. I bit too much. My main point is London St Pancras International to Paris Gare Du Nord.
Eurostar have not exactly been co-operative in the past, including legal threats against freeware devs. Unless there has been a serious change in Eurostar it's going to be tricky to get a deal agreed.