Melanies Hall’s last movements before her disappearance 13 years ago will be re-enacted in a fresh appeal for information on BBC’s Crimewatch on Wednesday.

Detectives in Bath, where the 25-year-old from Bradford on Avon went missing from, hope the programme, along with newly available CCTV footage, will help them to find her killer.

It is thought that the modern technology to view the material, that was not available at the time of the original investigation, will provide much needed answers as to what happened to the university graduate in June 1996.

Since her bones were discovered in vegetation at the side of the M5 on October 5, a police appeal has resulted in more than 200 calls from the public.

Detective Chief Inspector Gareth Bevan said: "We have had a good deal of information generated from calls from members of the public.

"I think it is a good result. Sometimes you can be overwhelmed by calls and they take us off to all sorts of directions which actually turn out to be red herrings, but these have been quite focused."

Examinations are still taking place of items found at the location where Miss Hall’s bones were discovered, following round-the-clock excavations.

He said: "We have been blessed with good weather over the past week which has made things a lot easier for the people working there.

"It has gone well. It has been a very detailed and thorough search that has gone on there.

“A certain level of ground has been removed and sieved and fingertip-searched.

"It is too early to say what significance we can place on those items that have been found."