I saw on Teletext that the club has appealed the red card. Rightly so, in my opinion. As I saw it, JT slipped, but never actually touched the attacker, who jumped and fell anticipating a collision. In my mind, it was not even a foul, let alone a card of any colour. For it to be a foul, there must be intent, or reckless disregard. Slipping over because you try to turn too quickly doesn't encompass either of those situations.
Finally, the main thing that convinces me of my position is that the w**kers on FACup MOTD all said "yep, bad foul, last man, deserves it for just being JT, had to go, should also have been a penalty anyway, CFC should forfeit the match, weren't plucky little Posh unlucky?".