Channel 4 will cut 340 jobs before the end of the year, shrinking its 1,270-strong workforce by roughly 28% as part of a major restructuring.

The broadcaster said the layoffs follow a strategic review intended to simplify its operating model and free up money for programmes. The network described competing pressures including shifting viewing habits, rising global competition and a volatile advertising market as drivers of the decision.

Chief executive Priya Dogra framed the move as the opening phase of a longer transformation. "Channel 4 is a precious asset which plays a unique role in the UK," she said, adding the organisation must change so it can "continue to make shows others won't, reach audiences others can't, and thrive as a distinctive and disruptive British voice for future generations."

Dogra told staff the redundancies would allow more of Channel 4's £1bn income to be spent on screen, and said the proposals were necessary to create "a simpler, more focused and more sustainable Channel 4." She warned the changes would be difficult for many colleagues and would have a significant impact across the organisation.

The broadcaster's statement said a consultation with staff will begin shortly and that a more detailed strategic plan will be published in the coming months. The cuts represent the largest round of redundancies in the network's history and follow a period of intense pressure on traditional broadcasters.

The timing comes amid wider challenges for Channel 4, including the current off-air status of Married at First Sight while a BBC investigation examined allegations of rape and other serious misconduct linked to the show. Launched in 1982, Channel 4 remains publicly owned but funded by advertising.

Caroline Dinenage, chair of the culture, media and sport committee, warned the announcement would be "deeply worrying for the talented and dedicated people who work at Channel 4" and said there were questions about what it means for the broadcaster's presence in the regions. She urged the network to preserve its independence and distinctiveness while pursuing efficiencies and collaboration.

What happens next is a statutory consultation process with staff and the publication of Channel 4's future strategic direction in the months ahead.