Radio Times was founded on 28 September 1923, and originally carried details of BBC radio programmes in response to a newspaper boycott of radio listings. It was at one time the magazine with the largest circulation in Europe. Until deregulation of television listings in 1991, the Radio Times carried only listings for BBC channels, while the ITV-published magazine, the TVTimes, carried only ITV and (from 1982) Channel Four listings. Today both publications carry listings for all major terrestrial (analogue and digital), cable and satellite television channels in the United Kingdom. A number of similar magazines, from independent publishers, also exist. However, the Radio Times still lives up to its name by being the most comprehensive source of UK radio listings in print, and also since the 22 May 2007 edition has carried two extra pages of TV listings per day as part of a slight tweak in the publication's format, bringing it up to 10 pages of listings per day in total.