Ms Roughley and an assistant were the only members of staff visible for most of the day, while three days earlier there were 16 babies in attendance including Genevieve.
Catherine Knowles, an independent children’s social work consultant, told the court the available floor space was “not sufficient”.
She said: “The whole set-up of this baby room was not conducive to a caring, nurturing or learning environment.”
She said CCTV footage within the nursery showed that falling short of the recommended number of adult carers to children “appears to be the norm”.
The expert said the safest sleeping position for a baby was on their backs and not on their front or side, and that “under no circumstances” should a baby’s head or face be covered.
She said she “firmly believed” Genevieve’s death was “totally avoidable”.
Ms Roughley, of Heaton Norris, Stockport, denies manslaughter and an alternative count of child cruelty.
