Douglas Clayton Durdle (born 1 September 1972), known by his ring name Doug Williams, is an English retired professional wrestler. He is best known for his work in Total Nonstop Action Wrestling, where he was a one–time Television Champion, two–time TNA X Division Champion and a two-time tag team champion, having held the TNA World Tag Team Championship and the IWGP Tag Team Championship once each as part of The British Invasion. He also worked as a trainer for TNA's developmental territory Ohio Valley Wrestling (OVW), where he was a one-time OVW Heavyweight Champion. Throughout his career, Williams has also worked in various promotions in the United Kingdom and abroad, including the Frontier Wrestling Alliance (FWA), One Pro Wrestling (1PW) and Pro Wrestling Noah.

Williams studied judo from the age of 11. Using this as his background, he began training to become a professional wrestler at the age of 16. At 19 Williams started working with NWA UK Hammerlock and became an active member of the roster during the mid-1990s, before moving on to FWA in 2001.

While competing in FWA's King of England tournament, Williams wrestled and won a match against Eddie Guerrero. Williams would also go on to become the promotion's top champion on two occasions. Williams wrestled against Martin Stone in the main event of the promotion's comeback show "New Frontiers" in August 2009, and has since become embroiled in the ongoing feud between Stone's faction "The Agenda" and the FWA Resistance.

By 2004, Williams would begin touring with Pro Wrestling Noah in Japan where he would become a Global Honored Crown Tag Team Champion with Scorpio.

Williams continued to win many foreign and local championships, even defeating "American Dragon" Bryan Danielson in the final of a tournament in Rethel, France on 6 May 2005 to become the first International Catch Wrestling Alliance World Heavyweight Champion.

While World Wrestling Entertainment was touring England in November 2006, Williams made a dark match appearance where he lost to Carlito.

Williams would also appear occasionally on television throughout 2007 and 2008 with British wrestling promotions whilst working with TNA Wrestling, due to the ruling their contracted wrestlers can appear in independent promotions that aren't televised in the USA.

Williams went on a tour around the United States on several occasions making notable appearances in Ring of Honor over the course of several years. He debuted for the promotion on 22 June 2002, defeating American Dragon. This victory earned Doug a shot at the ROH World Championship on 27 July 2002, which was fought under ironman rules in a four-way contest, which also featured Christopher Daniels, Low Ki and Spanky.