BBC News Online: UK

Ex-Rose West officer sues

Rosemary West: "Horrendous crimes"

Lynn Armstrong claims she was so traumatised by her exposure to the notorious killer in Winchester Prison it left her under the illusion West was innocent.

Mrs Armstrong, from Dorset, first spent time with West at London's Holloway Prison and moved with her to Winchester where she stood trial in 1995.

Her counsel, Andrew Bulhan, told the High Court in London she spent more time with West than any other officer.

It was partly the shock of West's conviction for "horrendous crimes" that drove Mrs Armstrong, of Oakhurst Lane, West Down, Ferndown, into depression and a dramatic personality change.

She was transformed from an ambitious and highly motivated woman officer into "a grumpy, argumentative, belligerent and, I'm afraid, disillusioned prison officer until she was medically retired," said Mr Bulhan.

He said it was at the forefront of Mrs Armstrong's case that she had been "encouraged to befriend" West by several prison governors in order to stop her committing suicide as her husband, Fred, was later to do before he could stand trial.

Her superiors had failed to protect her against the risk of psychiatric injury associated with prolonged exposure to one of the worst mass killers Britain has ever produced, the court was told.

The Home Office denies liability in the case, which is expected to last five days.