A GRIEVING mother last night vowed to fight on for justice after seeing child-killer Mary Bell win her battle for lifelong anonymity.

The High Court's Family Division in London granted the lifelong injunction for Bell and her 18-year-old daughter because of the "exceptional" features of the case and ruled that forbidding disclosure of their identifies did not establish a general precedent.

Bell was convicted of the manslaughter of Martin Brown, four, and Brian Howe, three, on Tyneside in December 1968.

She was sentenced to be detained at Her Majesty's Pleasure and was released on licence in 1980. She has since been given a new identity.

Last night, Martin's mother, June Richardson, said she would continue to campaign to stop Bell profiting from her story and planned to lobby her MP, Joyce Quin, and the Government.

Bell reputedly received £50,000 following the publication of a book into her life, Cries Unheard, five years ago by the author Gitta Sereny.

Speaking from her home in Gateshead, Mrs Richardson, 59, said she had hoped conditions would be attached to the anonymity, ensuring the killer could not make any money out of her past.

She had also wanted the High Court to order Bell to keep away from Tyneside, where she carried out the killings almost 35 years ago.

Mrs Richardson said: "The anonymity she has been given gives her a free hand to do whatever she wants to make money without any strings attached.

"It would not have been difficult for the court to have granted anonymity and imposed conditions to stop her making money.

"I cannot get on with my life now wondering what else she is going to do and feel I have been let down by the system.

"I am determined to fight for conditions to try and stop her from making any more money from her name."

Mrs Richardson disclosed that Bell's teenage daughter, who was at the heart of yesterday's anonymity hearing, was born on the anniversary of the day her mother killed Martin.

The day on which her son was killed, May 25 1968, was the date on which Bell's daughter was born 16 years later, in 1984.

Sharon Richardson, the sister of Martin Brown, who was in court in London, said: "We are devastated. No one is interested in our family - it is just Mary Bell.

"If she is not identified, there should be guidelines to say she is not allowed to make more money."

David Hines, chairman of the North of England Victims' Association, said the decision to maintain Bell's anonymity and that of her daughter was "disgraceful".

He said: "It is another slap in the face and a bad day for victims everywhere."

Ruling on the case, Dame Elizabeth Butler-Sloss said that Bell and her partner had since created a largely settled life in the community and had brought up her daughter to be a "charming and well-balanced girl".

Dame Elizabeth listed "exceptional reasons" in support of "taking this exceptional course" including the young age at which Bell had committed her offences, the time which had expired since they were committed and the serious risk of potential harassment and physical harm.

The only other child killers to have received lifelong anonymity are Robert Thompson and Jon Venables, the killers of James Bulger.