A call was made to Surrey Police by the Metropolitan Police around 9:40am today to say that the 14-year-old, who went missing on 12 September, was at a north London police station.
Her safe return is thought to be as a direct result of the media appeals, and the media and public are thanked for their assistance.
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Caroline Culverwell was walking 14-week-old Mika before a pub lunch when the puppy bolted out of sight as they reached the car park.
The Prime Minister was invited to meet survivors and residents of the west London tower block privately on Tuesday night.
Residents in Camden unsuccessfully campaigned to save the site at St James' Gardens, which was used as a burial ground from 1790 to 1853.