The coroner said Ms Lord, of King Street in the city, was on hormone replacement therapy (HRT) for the menopause and was taking medication for epilepsy.
Ms Lake said Ms Lord’s mental health was “noted as stable” in January 2023 but “there was evidence in the more recent past that she was acting out of character”.
A statement from her husband Clive Lord, read out in court, said: “Gaynor had recently watched a TV show about swimming in ice cold water.
“She’s never done it herself but I don’t know if in her confused state she may have been thinking about this.”
The inquest also heard Ms Lord had discussed with a friend whether swimming in cold water could help with hot sweats.
Mr Lord said he had seen his wife before she went to work and they had discussed planning a holiday to Japan.
He said there was “no reason” for her to be in Wensum Park and they had never visited it together.
He said there had been no “arguments” or “disagreements”.
