Prison books row: justice secretary could face legal action, says lawyer

Leading human rights lawyer Geoffrey Robertson QC intervenes against Chris Grayling as Nick Clegg backs book-sending ban

Campaigners fighting the Ministry of Justice over a ban on books being sent to prisoners on Monday threatened to take their battle to the courts.

The leading human rights lawyer Geoffrey Robertson QC, who has offered his services for free, said legal action could be taken against the justice secretary Chris Grayling for acting "unlawfully and irrationally".