Detectives investigating the murder of Bradford prostitute Rebecca Hall were "disappointed" with the response to a national television appeal to catch her killer.

But today they reiterated an appeal to the city's prostitute population and their customers to come forward with more information about the gruesome death of the 19-year-old mum.

After his appearance on the BBC's Crimewatch programme last night Detective Chief Superintendent Max McLean said he received only 40 calls from the public.

The officer in charge of the murder investigation, which is now more than two months old, said most of the calls contained "very little useful information".

Becky, from Little Horton, was murdered and dumped in an alleyway behind a car park in Thornton Street, Bradford.

She died from severe head injuries and had suffered a brutal beating.

Her body was found on Thursday, April 26, although she was last seen alive at about 10pm on Friday, April 13, leaving her home in Lydford House off Elizabeth Street.

Police are investigating the theory she was abducted and held somewhere before being killed.

Her baby son Jordan is being cared for by relatives.

Det Chf Supt McLean said: "We are disappointed that there wasn't more information from prostitutes and those who use them, and would appeal to them to get in touch.

"We did get some calls from people who knew her well, with important information, and we would encourage anyone with any other information to call us.

"We are in contact with the Streets and Lanes Project, so if anyone does want to speak to them rather than a police officer we can put them in touch."

On the Crimewatch programme Det Ch Supt McLean revealed that Becky's footwear, possibly a pair of black, knee-length boots, are still missing, as well as her Motorola Star Tac phone and her limited-edition South Park watch.

Call the freephone hotline on 0800 318001.