“Last night we were called by a member of the public out walking their dog, who had discovered a newborn baby in a re-usable shopping bag at the junction of Greenway and High Street South, E6.
They have given the baby a temporary name – Elsa.
“I am grateful to the members of the public who stayed at the scene to speak with officers and medics – your actions contributed to saving Elsa’s life.
“We believe Elsa to have been less than an hour old when she was found. We do not yet know how long she had been there when she was found.
“Our thoughts now turn to the baby’s mother; we are extremely concerned for her welfare as she will have been through a traumatic ordeal and will be in need of immediate medical attention following the birth.
“Trained medics and specialist officers are ready to support her and we urge her to get in touch by phone or walk in to the nearest hospital or police station.
“If you are the baby’s mother please know that your daughter is well, no matter what your circumstances please do seek help by dialling 999.”