The King's Cross area is rapidly changing (read: regenerating) and there's a few real gems here: books, food, shopping and a museum or two.
Gorgeous renovated train station, home to Eurostar, plenty of shops and a mini Fortnum & Mason.
Iconic piece of Modernist architecture, now turned into chi-chi-ish shopping mall. The Renoir cinema is well worth keeping an eye on as is Skoob books.
Beautifully renovated recently, and home to Platform 9 3/4 (Harry Potter fans rejoice) and the wonderful Watermark bookshop