BAE Systems is to cut 1,775 jobs at its yards in Scotland and England and end shipbuilding altogether at Portsmouth in southern England.
About 835 jobs will be lost at yards in Rosyth, Govan and Scotstoun in Glasgow,
It is believed 940 staff and contractor posts will go at the Portsmouth site, which will retain repairs and maintenance work.
The cuts follow a drop in work after the end of aircraft carriers work. The vessels are currently being assembled at Rosyth
BAE Systems said it had made the cuts because of a “significant” drop in demand.