PLEASE get in touch to tell us you are safe - that's the message from police to the mother of abandoned baby Oliver.

The baby - named Oliver by police officers, and aged between 18 and 21 weeks - was found in a pushchair on the front lawn of Darren and Sarah Langley's home in Collingwood Crescent, Somerton, Newport, on Sunday night.

Now Detective Inspector Nick Jarrett, (pictured) who is leading the search for little Oliver's mother, has made a plea for her to contact police.

"Oliver is doing very well with his foster parents," said DI Jarrett. "The disturbing factor is that after three months there's quite a bond between mother and child. This is why we have concerns for Mum. A young mum who leaves her child in these circumstances must have a lot of emotional problems, and that is our concern. The longer it goes on, the more concerned we are for her.

"If Mum is out there, we want her to make contact with us to let us know she is OK, even if she wants her whereabouts to remain secret."

DI Jarrett also appealed for any relatives of baby Oliver to get in touch. But officers are surprised by how few calls they have received about the baby. "We would think someone out there would identify this child - clearly that is not the case," DI Jarrett said. "The response from the public is a lot less than expected."

South Wales Police passed on details received in a call on Tuesday night - but officers have ruled out any connection.

The 15 officers currently working on the investigation are still focusing their search on the Newport area, and have been carrying out house-to-house inquiries near where Oliver was found.

"We have to satisfy ourselves that the mother is not from Newport or the baby was not born in Newport before we extend things," said DI Jarrett.

The main line of inquiry now is a register of births in Newport between August 1 and October 31 last year, which shows 390 boys were born in the town between these dates. GPs are being asked if they have seen any of the babies who are their patients since Sunday. Those who have been seen can be eliminated from inquiries.

Police are also planning to obtain a court order which will allow them to take a blood sample from baby Oliver. This will allow them to rule out any baby on the register of a different blood group.

A court order is needed because although Oliver is in the care of social services, they do not have parental authority. Detectives have now narrowed down the supplier of the pram Oliver was in when he was found and have a list of all the purchasers in the last six months.

The list of those who bought the McClaren pram from the Index group since September 1 included seven people from New-port.

DI Jarrett said he remained very hopeful that Oliver's mother would be found. Anyone with any information about baby Oliver is asked to contact police on 01633 838111 or 01633 244999.