War of the Worlds UK was a multi-promotional professional wrestling "supershow" tour jointly produced by Mexico's Consejo Mundial de Lucha Libre (CMLL), New Japan Pro-Wrestling (NJPW), the UK based Revolution Pro Wrestling (RPW), and the U.S.-based Ring of Honor (ROH). The tour's three events took place on August 18 at the York Hall in London, August 19 at the Liverpool Olympia in Liverpool, and August 20 at the Edinburgh Corn Exchange in Edinburgh. The second night in Liverpool aired as a pay-per-view.