Hahahaha I totally get you! I really don’t know myself! At first I thought he was just being sarcastic, but after he’s mentioned it several times, I started to wonder whether he really auditioned for it or got an offer but had to deny cos he was busy filming Go On etc?
It’s hard to tell cos he really always jokes, especially hard to tell via the internet. (But when he jokes about being in love with Courteney, I know it seems like he’s joking but he really uses it as a defense mechanism so people just think he’s easygoing with her when irl he has all those feelings for her. Ha, figured him out. Sry, I rambled.)