The King of Tonga looks very well, but he is in fact wearing a frock coat rather than a morning coat - and very well too. The (male) Middletons haven't had much mention in this thread but both did very well, I thought, especially James with his nicely-proportioned stiff detachable collar. I didn't think that David Beckham quite carried off his wing collar (it could have done with being taller and stiffer) but the shot of him smiling above shows it off better that I have hitherto seen it. Of the other celebrity couple, I thought Sir Elton John looked rather fussy (I think his waistcoat was yellow embroidered rather than buff, as some others have had it) whereas David Furnish looked very well put together. Pleasing to see some buff waistcoats and a blue amongst the grey. Cameron's wasn't a favourite of mine, but kudos to him for getting the morning dress out.
In the father and son photo with their DB tuxedos, it appears both of them have all buttons fastened. After checking the Double Breasted Style post pictures, most of them have the bottom right button (from the wearer's perspective) not fastened. What is the rule for this?