Detectives are to retrace the last train journey taken by murder victim Maria Carter from Bradford to London in a bid to find new suspects.
Posters appealing for information from commuters have been put up at Bradford Interchange and other West Yorkshire stations.
The 34-year-old was found brutally stabbed at her London home - days before she was due to announce her engagement to her Bradford-based boyfriend.
On Monday, detectives from the Metropolitan Police will catch the same train as she did two weeks earlier, boarding the 11.05am GNER service from Leeds to Kings Cross.
Officers say Maria Carter had spent the weekend with her boyfriend in Bradford and caught the train back to London.
She later told friends that she had met 'a chap' on the train and got talking and police are keen to trace the man, who is said to live in London. The following morning, Tuesday January 18, she was found stabbed.
Today Detective Chief Inspector Phil Kent, who is leading the inquiry, said he had officers investigating in both Bradford and London.
"We have two officers carrying out further inquiries in Bradford," he said. "We are distributing posters with photographs of Ms Carter at railway stations and on Monday officers will travel on the train and speak to commuters. Maybe when people see her photograph, they will remember something." A spokesman for the train operator GNER added: "Hopefully, this will spark the memory of one of the regular travellers on that train." Anyone with information is asked to contact the incident room on 0181 284 9757.
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