New CCTV images have been released of two people police want to speak to as part of the investigation into the disappearance of Suzanne Pilley.
The images were taken in Edinburgh's Thistle Street around the time Suzanne was last seen walking to work.
The 38-year-old bookkeeper from Stenhouse vanished on May 4 last year.
Neither of the people Lothian and Borders Police are hoping to speak to are thought to be suspects but they are keen that they come forward.
The first is a woman aged between 18 and 30 years old with long dark hair, which was tied up.
She is slim and was wearing a black and white scarf, black waist-length jacket, short skirt, grey tights and black knee-length boots.
As she walked down Thistle Street from Hanover Street she was carrying a bag over her right shoulder.
Officers believe she might have got into a small blue car that drove off shortly after her arrival.
The car then had a near miss with a bus as it turned right out of the cobbled street into St Andrews Square.
The second is a man aged between 20 and 40 years old of medium build, with short dark hair. He was wearing a brown waist-length jacket, blue jeans and carrying a small green plastic bag that may have been from Marks and Spencer.
He walked along Thistle Street in the same direction as the woman and went into Prospect House, next to the offices in which Suzanne worked.
Detective Sergeant Stuart Houston said: “We are looking to speak to two people who were in the street on the morning of Tuesday May 4 at the time Suzanne was making her way to her work place.
“I would ask people to have a look at the images to see if they recognise themselves or someone they know. I would love them to come forward so we can speak to them regarding their presence in the street that morning.
“We believe the woman entered a small blue car. That car is seen to leave Thistle Street and turn in to St Andrews Square and has a narrow miss with a bus which was passing at the time. We are hoping this is something that someone may recall.
“It is an unusual step but we are keen for them to come forward.”
Detective Chief Inspector Gary Flannigan, leading the investigation, added: “Please take time to look carefully at these images. Do you recognise yourself or a friend?
"It is very important that we speak to these people in order to determine that they have no additional information to offer the enquiry.”
David Gilroy, 47, is on bail after being charged with Suzanne's murder, although her body has never been found.
Andrea Gilroy, 42, was released on bail after appearing on petition at Edinburgh Sheriff Court in December, charged with attempting to pervert the course of justice.
Anyone with any information should contact Lothian and Borders Police on 0131 311 3131, or the charity Crimestoppers, in confidence and anonymity, on 0800 555 111.