Charity: Kate's sickness 'constant and ongoing'

A spokeswoman for Pregnancy Sickness Support, a charity which helps women with Kate's condition known as hyperemesis gravidarum, said the Duchess would be experiencing constant nausea with regular vomiting ahead of Wednesday's Hobbit screening.

I would be amazed if she's able to go to the premiere. When she's more like 14-plus weeks possibly she will have days when she can do that.

The sickness is constant and ongoing, it's just a matter of keeping on top of it. She might have days that are a bit better than other days but realistically you don't have days when you're actually well.

– Charity trustee Caitlin Dean