In August 1986, it became the first terrestrial station in Britain to offer 24-hour television. This was achieved by simulcasting the satellite station Music Box from around midnight to the start of TV-am's transmission. Both YTV and Music Box were partly owned by the same company (WHSmith). The experiment ended shortly before Music Box closed down in January 1987 and was replaced by a teletext-based Jobfinder service which broadcast for one hour after closedown. YTV re-introduced 24-hour programming 18 months later along with the rest of the ITV network, beginning full-time 24-hour broadcasting on 30 May 1988.