Defence giant BAE has confirmed it is considering closing one of its major shipyards in a move that could threaten more than 1,000 jobs.
BAE's UK chief executive Nigel Whitehead told The Sunday Telegraph a decision was expected by the end of the year.
The future of its three major bases - one at Portsmouth and two in Glasgow, at Govan and Scotstoun - has been under threat after BAE launched a review of its maritime operations this year.
It is believed Portsmouth is most at risk and a closure could reportedly put about 1,500 jobs at risk.
Mr Whitehead told the newspaper that plans for a "reduction in footprint" could see "the cessation of manufacturing at one of the sites".
"We will be making decisions this year," he added.