The psychiatrists criticised for deeming Anders Behring Breivik – the self-confessed killer of 77 people in Norway last year – too mentally unfit to go to prison have defended their stance, calling him delusional.

Anders Behring Breivik, who is set to go on trial on Apr 16 for killing 77 people in Norway last July, wrote that being sentenced to psychiatric care would be the worst fate imaginable.