2011, Lancashire

Anna was a classroom assistant in Colne, Lancashire. She was killed by her boyfriend of four months, Daniel Lancaster, 25.

Their relationship was described as "obsessive" and he apparently admitted murdering her to a cellmate, but denied murder in court and admitted manslaughter "after claiming Anna Banks, 23, enjoyed being throttled during intercourse." "There were marks around her throat and dried blood on her face. It is believed her body had been there for at least 24 hours." He as found not guilty of her murder by a jury, but admitted manslaughter as part of "a sex game gone wrong."

Manslaughter, 4 years

2010, Liverpool

Vicky was “a tall, blond, 25-year-old newlywed who worked as an account manager and who could calculate a balance sheet or assemble a wardrobe without breaking a sweat.”

Vicky's husband of 6 months, Michael Roberts, insisted he accidentally killed Vicky during a kinky sex game gone wrong, when he applied too much pressure to her neck with a dressing gown cord. Roberts, then 27, had hidden her body after killing her, and the court heard he had had numerous affairs. Vicky had found out that he’d been cheating on her, and had given him a deadline which fell on the weekend he killed her.

Vicky's family have since spoken of the terrible effect on them of Vicky’s murder. Her sister says: “He took away Vicky, her choices, her chances, her future. And then he took her dignity. Even now, it’s the ‘sex game gone wrong’ that gets focused on. Even though it was disproved, it’s always going to be there.”

Murder, life, min term 17 years