Sir Peter Leslie Gibson (born 10 June 1934), is a former British barrister and Lord Justice of Appeal of the Court of Appeal of England and Wales, and is currently a judge of the Qatar International Court. Gibson has also served, between April 2006 and December 2010, as the UK's Intelligence Services Commissioner, and was appointed by David Cameron in July 2010 to lead the Detainee Inquiry. He is an honorary member of the Society of Legal Scholars.