A SOUTH Gloucestershire mum who has gone into hiding with her 10-year-old son may have tried to change her appearance, police have said.

Kelly Jefferies and Knox left their home in the Patchway area in July after care proceedings began when concerns were raised for the boy's welfare.

Police investigations have been unable to find them but they may have initially travelled to the Oldham area.

Officers said they believed Kelly may have dyed her hair blonde and have released a new image of her.

Kelly is described as white, about 5ft 2ins, of slim build and has brown eyes.

Social workers had expressed concerns about the boy’s welfare and South Gloucestershire Council began care proceedings on July 2 this year.

A family court judge then took the step of holding a hearing in public to help find Ms Jefferies and Knox, who were last seen on 28 July.

Detective Chief Inspector Kristina Windsor, said: “Kelly and Knox’s welfare is our primary concern and we’re working extremely hard to locate them to check they are both ok.

“We understand Kelly may not want to be found but we can’t in good conscience stop looking for her and Knox when we’re worried about them.

“We’ve previously issued a photo of Kelly which shows her with her natural brown hair colour but we believe she may have recently changed her appearance.

“She’s previously dyed her hair blonde and so we’re releasing another picture of her today which was taken some years ago to show what she may look like now if she’s coloured her hair again.”

DCI Windsor added: “As Kelly and Knox could be anywhere, we’re asking for the public’s help in sharing our appeal on social media as we know this increases the likelihood of them being found.

“We’re also asking anyone who sees either of them to call 999 immediately and ask the operator to be put through to Avon and Somerset Police before providing the call handler with the reference 5221171972.

“Anyone with information about their whereabouts should contact the force via the non-emergency 101 number quoting the same reference.”