A nurse charged with the murder of three patients in West Yorkshire will not be tried until next year.
The offences are said to have been committed between 2000 and 2002
Anne Grigg-Booth, 51, from Nelson, Lancashire was a night matron at Airedale General Hospital in Keighley.
At a short hearing at Bradford Crown Court on Friday she was also charged with the attempted murder of a 42-year-old man.
Ms Grigg-Booth was released on bail. Her trial will start on 25 April 2006 and will last about three months.
She is accused of the murder of Jane Driver in 2000, Eva Blackburn in 2001 and Annie Midgley in 2002.
The attempted murder charge relates to the death of Michael Parker in 2002.
In addition, she faces 13 charges of administering noxious substances to other patients between June 2000 and July 2002.
On Thursday, it was announced that two women aged 52, and a man, 56, who were questioned last year on suspicion of administered noxious substances at Airedale General will not face charges.
As part of the same inquiry, another two men are still on bail on suspicion of manslaughter and perverting the course of justice.