Who's dated who?

Sorry, I find the strangest things sometimes…

So the guy Jenna-Louise Coleman dated before she saw sense the perfection that is Richard Madden was Karl Davies, or… Ser Alton, you know - the Lannister  who delivered Robb’s terms to Cersei and Joffrey, ending up in the pen with the Kingslayer from where it all took a quick turn downhill for him.

I’ll have to re-watch those episodes.