Claudia Winkleman (in-universe)

Claudia Winkleman was a presenter.

She once travelled with the Eleventh Doctor. (TV: The Doctor Drops In)

She once unsuccessfully attempted to seduce the Eleventh Doctor. (TV: The Doctor Appears)

Behind the scenes
Her half-sister is Sophie Winkleman, who played Kelly Westwood in the Big Finish audio stories The Eight Truths and Worldwide Web.

Information from invalid sources
She attended Sprout Boy's Christmas party and met the Twelfth Doctor. (NOTVALID: Sprout Boy meets a Galaxy of Stars)