Greville Janner is unfit to stand trial for a string of sex offences against boys dating back 50 years because of “deteriorating and irreversible” dementia, a High Court judge has ruled.

The Director of Public Prosecutions for England and Wales is facing calls to resign after she was forced into a U-turn over her decision not to charge former MP Greville Janner for alleged child sex crimes.

London Mayor Ken Livingstone today again refused to apologise for comparing a Jewish reporter to a Nazi concentration camp guard, insisting he had nothing to say sorry for.