Royals impress despite illnesses
Let's get the thoughts of Stephen Bates, former royal correspondent for the Guardian.
He was impressed by the King's performance despite his illness, albeit from a carriage rather than on the traditional horseback.
"He's still undergoing treatment for cancer, so I don't think you could expect him to be prancing about on a horse," he said.
Despite that, "he looks, fit and in reasonable health", Mr Bates added.
He praised him for standing to attention for much of the parade.
Mr Bates was equally as impressed with the Princess of Wales.
"Everyone who's had a cancer diagnosis in the family knows that feeling as they go through treatment... [they have] good days, bad days, the need for rest, the need for slow recuperation.
"It's obviously been a very serious and difficult period for Princess Kate and she's come through it looking absolutely radiant."
He said he thought she looked "desperately thin", but nonetheless "absolutely gorgeous".