A 15 year old girl and her baby son are still missing. Romanian-born Catalina Covaci and six-month-old Ricardi were last seen leaving her home in Penrith, Cumbria, when she told her guardians she was going into the town centre.
She has lived in the country for 18 months but has family and associates across the UK including Manchester, Oldham, Glasgow, Hull and London.
Police have discovered that she was on a train bound for Manchester Piccadilly on Wednesday afternoon.
Detectives are particularly interested to establish whether Catalina and her son were travelling with anyone else and are appealing to witnesses to come forward.