Nice of her to congratulate and compliment our queen.
It's also a nice thing to have such a unifying head of state. This is why we like our sort of system. She's non-political, so nearly everyone likes her. And so being British feels good once in a while! We get to have some days where everyone roots for the same thing.
It's a shame there are those people who are desperate to yell words like colonialism, slavery and exploitation around. That's water off a duck's back for most British people, pretty much.