Times journalist falls through the cracks in the AJC
> Here is where cross-border travel is less fun — despite its staff having caused the delay [the Italian train was hauled by an SNCF locomotive], SNCF wouldn’t reroute me because this was an Italian train. The upshot: about £750 on new trains, a hotel and a 6am taxi to make my ferry.
Looks like she got to the "not at all clear what happens here" part of @jon 's flowchart https://jonworth.eu/railpassengerrights/
https://www.thetimes.com/article/9951c787-b8ba-4258-bef9-8372859982d4