Okay, I'm going to go out on a limb here. A feeding started at 2:34 pm. One parent, one chick. I believe it was Smiley feeding the chick due to the fact that the lunch was not plucked before hand and was done during the feeding. And that only one chick (greedy guts) was fed.
After about 5 minutes the other parent showed up with a meal for the other chick. This meal was less frantic, leading me to believe that it was Princess.
Neither parent showed enough of themselves to make a positive id, but given the behaviour, I'm going with Smiley for the first feeding and Princess for the second.
Again, I could be totally wrong.