But while Mr Grieve - the government's chief legal adviser - would not be drawn on the controversial move to block release of the NHS transition risk register, he doubted whether the case was part of moves to change freedom of information policy.

BBC: Whitehall

The real question is whether the ad generates enough patients to really ring the Dendreon register.

FORBES: Is The Dendreon TV Campaign For Provenge 'Too Little, Too Late?'

The final decision of whether an offender should remain on the register will be down to the police, not the courts, as in Scotland.

BBC: Q&A: Sex offenders register

Mr Livingstone said that when he became an MP in 1987 he had checked whether income paid to his firm Localaction Ltd should be individually declared in the register of MPs' interests.

BBC: Ken Livingstone

The government has said it has not decided whether to appeal against the decision, and Health Minister Earl Howe said the risk register would not be published until the tribunal had explained its ruling.

BBC: Labour granted emergency debate on NHS Bill