So, two questions.
ST+ holders can resell their tickets - anyone know when the club put them on sale?
The club will only put them on sale if a game sells out, the Man U game has - but I haven't seen anything flag up that extra tickets are available.

If a ST+ holder indicates to the club that they want to sell their ticket, how do they know if it has been sold or not

"Players lose you games, not tactics. There's so much crap talked about tactics by people who barely know how to win at dominoes." (Brian Clough)