Under pressure, Jack Straw has decided to intervene on behalf of Bisher al-Rawi.

His lawyers said afterwards that the decision to intervene was only an expedient way of avoiding the publication of sensitive information about MI5's relationship with Mr al-Rawi.

Mr al-Rawi, who has a wife and five children living in the UK, has always maintained he had contact with Abu Qatada that was "expressly approved and encouraged by British intelligence", to whom he supplied information about the cleric.

He said representatives of security services had assured him that, should he run into trouble, they would intervene and assist him.

See:
http://news.independent.co.uk/uk/legal/article353012.ece.