Pregnant Duchess of Cambridge reappears in public
On a blustery but dry Horse Guards were two couples who represent the present and the future of an ancient institution.
For the Queen, this was the 108th time she's welcomed a visiting head of state. She's greeted presidents, monarchs and a grand duke.
For William and Kate, it was the first time they've been so involved in such an occasion. It was a novelty. It was on the job royal training.
It will one day become routine.
Inevitably, the focus was less on Anglo-Singaporean relations and more on a pregnant duchess. In the coming days, weeks and months aspects of this pregnancy will be lived out on a very public stage.
There'll be speculation about the due date and the sex of the child. The fact this baby won't, as things stand, become a king or queen , is unlikely to dampen the international fascination.