Ok, hear me out, I don't think we're going to get London to Paris in TSW via the channel tunnel, but SEHS doesn't look right without Eurostar services, so, if these 186mph emu's are made for TSW, and if I'm correct in saying SEHS is set between 2016 and 2019, Eurostar's were still stopping at Ebbsfleet and Ashford, so they could be driveable. As for the non-stop services, this wouldn't be mandatory but for non-stop, outbound services, complete the run to Ashford, but the service ends as you're going across the viaduct/bridge avoiding Ashford. This would be mandatory if the route was set in the present day because, nowadays Eurostar services are non-stop between London and the channel tunnel. Also, you could do ECS moves as far as the line branching out above Stratford International, which would ordinarily go to Temple Mills depot, or model Temple Mills depot on the original route. If you're somehow not familiar with what they look like, then here It would be appreciated if both the old and new liveries for the 373 were included. Let me know if you think this would be worth it.
e300 is a must-have! Right now I use the TGV Duplex to replicate these services as it’s the closest thing in my collection. Nice, but doesn’t do the job just right.
So far as I remember southeastern high speed is set in 2018. So it's possible, I know I would buy it day one.
Now,GNER did have some 373 sets that operated domestic services from Kings Cross to Leeds and York in the early 2000s. Make some for that and then some services for HS1, that would be cool