BBC teletext service, Ceefax, was introduced, created initially to provide subtitling, but developed into a news and information service. In 1978, BBC staff went on strike just before the Christmas of that year, thus blocking out the transmission of both channels and amalgamating all four radio stations into one. Since the deregulation of the UK television and radio market in the 1980s, the BBC has faced increased competition from the commercial sector (and from the advertiser-funded public service broadcaster Channel 4), especially on satellite television, cable television, and digital television services. In the late 1980s, the BBC began a process of
TVNZ is still use the former channel programs). TVNZ began a teletext service in 1984 originally with the intention to help New Zealand's deaf community get improved access to news and information. A captioning service was available for certain television shows and could be accessed by browsing to page 801. The TVNZ Teletext service could be received on all TVNZ channels and the TVNZ service could be received on TV3 including captioning of some TV3 shows. Trackside also operated a Teletext service called TAB Text which only displayed the racing pages of Teletext. A Teletext capable television was usually required to