It is not the first time the murder of Debbie Linsley has been re-investigated. In 2002 police thought that they had made a similar breakthrough, giving them the ability to complete a map of the killer's DNA , left behind at the scene.
Here is a news report from 13 September 2002.
More top news
Services on major rail routes between London and south west England have been severely disrupted after a person was hit by a train.
The business executive, whose ruthless interviewing technique has won him many fans, is replacing Nick Hewer, who quit after a decade.
Recent opinion polls show Labour within striking distance of capturing the trophy seat of Finchley and Golders Green.