Lord Carlile acted from 2001 to 2011 as the UK's Independent Reviewer of Terrorism Legislation. He was succeeded by David Anderson QC. The Director of Liberty, Shami Chakrabarti, called Carlile's support for control orders "disappointing" in a February 2006 press release condemning the introduction of control orders by the Prevention of Terrorism Act 2005. Following the resignation of David Davis to fight a by-election on an "anti 42-day" platform, Carlile wrote an article for "The Sun" criticising his stance. In 2015, he joined with a cross-party group of peers to reintroduce the Draft Communications Data Bill, known by its opponents as the "Snoopers' Charter". He was an independent reviewer on the 2015 Assessment on Paramilitary Groups in Northern Ireland.