Lydia Summers was a social worker who, in February 2000, was alerted by Dr Wilson to the fact that thirteen-year old Sarah Louise Platt was pregnant. Sarah had visited the doctor's surgery with her mother Gail the week before and Lydia called at 8 Coronation Street to assess the situation.
The rowing family were not dealing well with the news of the expected baby and Lydia’s sudden arrival and questions about Martin being a stepfather to Sarah and his and Gail’s working shift patterns did not help matters, with Martin suspecting that Lydia wondered if he was the baby’s father. Lydia gave Sarah a more sympathetic hearing when she spoke to the girl alone in her bedroom. She assured her that she was not on her own and would be given any help that she needed.