[quote=Imperfectionist]
Heh, yeah, I had that same thought... Can't slit a throat through power armor, nor would a thrown knife be anything more than a momentary distraction.
[/quote]

In every piece of armor, there are always opening points and its usually the neck. A knife can hit the opening point and cause instant death. He would usually hit the jugular. He could have killed a power armor guard.

Plus with the mass population of women in London, i'm not sure the royal family would be able to send power armour guards to every impreganation. :P