I know & it's pretty petty that only STH holders in the correct tier can by re-sale tickets even though it is well passed the sale dates for other tiers.
I'm not completely sure what it means either :smile:.
However, if there are 2 of you that regularly travel by train together then it is worth getting a Two Together rail card.
It costs 30 for the year but you get a 1/3 off each time you use it.
If you use it for the Man Utd game you will...