I'm not sure nationality of the company makes a blind bit of difference to any future ORR or legal appeal. Eurostar is operating trains over the infrastructure being contested. It has an undeniable interest in the allocation of the capacity of that infrastructure.
oh I’m sure it doesn’t from a hardcore legal perspective. But it would hardly help the case in court for Eurostar if they were to take action in the European legal system against Virgin on access to French infrastructure.
That would be an SNCF-owned monopoly operator, suing a competitor, to try and block access to SNCF-owned infrastructure. You wouldn’t have to be paranoid to expect to find smoke somewhere.
The more likely scenario I would expect on the European end is Virgin suing SNCF Réseau for shenanigans around track access to LGV-Nord, directly or indirectly accusing them of colluding with a theoretically independent company (Eurostar, owned by SNCF Group, which also happen to own SNCF Réseau), to block competition.
In reality SNCF would have to be pretty silly to give Virgin a serious reason to sue, as unless they could prove Virgin have a genuine issue with their applications SNCF would be opened to exposing their own protectionism in court. Virgin are nothing if not rigorous and will be applying for access to the LGV with eyes very wide open so will make sure their application is completely copper-bottomed to give SNCF no excuse to reject it.