BenS123
Member
XC sadly is quite random with their reservations - I use their services pretty frequently on their South Coast route and I'd say reservations haven't shown more than they have. This has happened with a variety of retailers.However the Seat reservations allocated for Derby-Sheffield part weren't on the train seat displays (it showed as available).
It's also worth being aware that CrossCountry do turn off their reservations system intentionally from time to time - for example on strike days all reservation screens intentionally showed "Available" (source: DM from CrossCountry social media team)
I don't think it's a problem with RailUK tickets, but it's with CrossCountry as the voyagers seem to have extremely unreliable reservation screens.