Chalk Farm
Actually I'm just guessing this is her name1, she was in a kids TV show called The Queen's Nose2. There's a picture of her here2. Chalk Farm tube station, this morning.
Celeb spotting action, not really stalking. Gotta catch 'em all! Originally a popular feature of my site popex.com, so mostly from the early 2000s. 99% written by valued punters. Hopefully now with some bonus location content that was lost for a while.