Christmas gifts for a London-bound traveler

[mbcdefg]

I'm starting to put together my Christmas shopping list. My friend is taking her first trip abroad next year - she's going to London with her family. I'm the only person she knows who's been there (and I was only there for four days, two years ago), so she's been asking me for tips and suggestions.

Any suggestions for Christmas gifts that could be useful on her trip? I saw this show on TV and liked it a lot, so I may get her the DVD: www.amazon.com/Globe-Trekker-Wright-Justine-Shapiro/dp/B000HEZFB8/ref=wl_it_dp_o_pC_S_nC?ie=UTF8&colid=3894R91V5JU8S&coliid=I1WM5CDA402UIO

Other ideas I'm researching: luggage tag, passport case, guidebook (which one?), outlet converter if she doesn't already have one.

Her personality: she's a librarian, doesn't drink, has a Kindle and an iPhone and a nice camera already, and *loved* the Boots lip balm and Cadbury Buttons I brought her back from my own trip.

[mbcdefg]

Thank you