I'm trying to book tickets on the 1928 Virgin Train from London Euston to Glasgow Central on Sunday 23rd April. On the Virgin Trains site I can buy a regular ticket, but it says "reservations aren't available". Advance tickets (and thus reservations) are available earlier that day, and for the days following. I've contacted Virgin Trains, but every time I do they say that reservations (and advances) should be up by now and they'll get back to me the next day, then they never do.