When I returned to the United Kingdom, I found that I could no longer justify Islamist extremism as the antidote.

Amnesty International adopted me as a prisoner of conscience, and that led to my - it touched me in a way that really led to me opening up my heart, I've called it the re-humanisation process.

I had the assassins of the former president of Egypt, the leader of the Muslim Brotherhood was with me in prison, the leaders of my own former group Hizb ut-Tahrir were with me in prison and so by the time I was released at the age of 28, I wasn't the man who went in at 24.

I am everything I am today, because of my past.

Does freedom of speech give the right to offend?

No form of theocracy, whether it's manifested in a violent or non-violent form, is ever good for civilisation, and we have to challenge it in civil society as well as we would challenge Christian-based theocracy, or any other form of bigotry.

In prison I had the opportunity to debate and discuss people that had subscribed to all forms of Islamism.