Journalists and technicians will stage a 24-hour walkout on January 27 and a four-hour stoppage on January 31 unless there is a breakthrough during talks at the conciliation service Acas next week.
Members of the Broadcasting Entertainment Cinematograph and Theatre Union (Bectu) and National Union of Journalists (NUJ) voted by 80% majorities to back industrial action at a mass meeting yesterday.
Gerry Morrissey, Bectu's assistant general secretary, said: "The changes put forward by ITN erode our members' family lives, which is totally unacceptable. The company can afford to introduce family-friendly working practices but refuses to do so."
Managers want night working for all employees in plans to turn the station into a 24-hour news channel and to service its new contract to provide GMTV with news from next month.
ITN said it understood changes would alter the working lives of some individuals.
But its primary concern was job security and, to achieve that, it would have to be flexible enough to deliver services demanded by existing customers while branching out into new ones.
