Ellie Darvill

 voiced several roles in various Big Finish Doctor Who audio stories and spin-offs.

She is the mother of Arthur Darvill.

The Seventh Doctor: The New Adventures

 * The Dread of Night - Willis

Bernice Summerfield

 * The Grel Invasion of Earth - Davina

The Year of Martha Jones

 * Silver Medal - Baby Lizzie
 * Deceived - Toclafane

Torchwood

 * The Last Beacon - Pat
 * Serenity - Vanessa

Torchwood special releases

 * Parasite - Gerta