Kristen Stewart Spotted Landing in London... Wearing Rob's Pants?

Today K-Stew was spotted arriving at the Heathrow Airport in London, England. She was with her bodyguard who was seemed to be taking his job very seriously.

Is it me or does her hair seem to have an auburn-redish tint?

Wonder why she's in London...

---Ashes

*Warning - pap pics*

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[Lorabell note: I have to put in my two pence on my gal in my home town - I'm wondering if she's in London for pre-production on Snow White and the Huntsman... or maybe just visiting "the in-laws" ;)

P.s. DC noted in the comments that Kristen looks like she's wearing some Pattz pants - can anyone place them?]