The mother of a woman murdered 12 years ago is to make a fresh television appeal for information about her daughter’s killer.

Emma Caldwell, 27, was found dead in woods near Biggar, South Lanarkshire, in May 2005, a month after she was last seen alive.

Police have been reinvestigating the unsolved case since the Crown Office asked them to in 2015.

The original investigation failed to bring the killer to justice.

Ms Caldwell’s mother Margaret will feature on the BBC’s Crimewatch Roadshow at 09:15 BST on Monday.

Detectives from Police Scotland will also appeal for information on the programme and will urge anyone who may have seen Ms Caldwell in the weeks before her body was found to come forward.

In April, police revealed they were carrying out searches near where her body was found and were investigating a potential new sighting of her on the day she disappeared.

Two weeks ago it was revealed “several items” of new evidence including women’s clothing had been found in a search of woodland near Roberton.

The last recorded sighting of Ms Caldwell was on Butterbiggins Road on the south side of Glasgow at about 23:00 on 4 April 2005.

But detectives now believe she may have been seen at the bottom of Argyle Street in the city at about 23:30 on the night she went missing.

Ms Caldwell, originally from Erskine in Renfrewshire, could have been seen getting into a black saloon car, similar to a BMW, that may have been owned by someone from the Dumfries area who regularly came to Glasgow.

Crimewatch Roadshow will broadcast every weekday until 7 July.