I do not know but for a CP to walk about in London with no bodyguard is kind of risky. Especially of there is a photographer who recognises or follows her and snaps photos. I find it dangerous.
Don't be worried, Odette! The safety arrangements are very strict without doubt. Part of that bodyguard-thing is that people don't even know who is a bodyguard. There is safety personnel (or whatever they are called in english) all around the area Crown Princess Mary is walking.