Ddetectives have received more than 1800 leads but key evidence including one of the ski socks she was wearing and the pizza have not been found.
Investigations have been made into whether the sock was used to strangle her, then kept as a trophy.
Detective Chief Inspector Phil Jones, who is leading the murder investigation, said:
“The [Crimewatch] programme allows us to visually recreate the route home she took with the aim of jogging the memories of those people who may have seen her.
“The reconstruction may also jog the memories of those people who used Longwood Lane in Failand on Friday December 17 or over that weekend and have not come forward. This is a valuable opportunity for us to reach out to the nation in their homes.”
Anyone with information is asked to contact the Operation Braid incident room on 0845 456 7000 or Crimestoppers on 0800 555 111.