not sure if they have put this together after some people were disappointed at launch (and they have probably lost a decent amount of sales because of it) or it was already planned, but it's great news. I was indifferent about the game, and I love GT.
But now it has a singleplayer campaign (not the biggest, but looks decently sized based off of those screenshots) and is only £25 on PSN BF sale, I'm gonna jump in