Elspeth was a stall owner in the Lifemarket on Bryce's Asteroid. She sold equipment such as birthing vats and cryo-containers. She explained the nature of the Lifemarket to the Sixth Doctor and Peri.
When the Doctor wanted the attention of the local police, he destroyed Elspeth's stall and equipment, apologising to her ahead of time. (PROSE: A Star is Reborn)