Mr Renowden said: “I know she will likely be feeling very frightened and going through an extremely difficult time.
“If you are the baby’s mother and you see this today, I want to appeal directly to you to come forward and receive help, my priority is to help you, to make sure that you can receive medical assistance.”
He added she can get assistance anytime by attending any hospital, police station or by calling emergency services.
He also appealed to anyone who may have information to come forward.
They can call 101 or make an online report quoting reference 1879 and today’s (26/3) date.