TRADES unions have marched on Portsmouth, fearing planned shipyard job cuts will cost more workers' livelihoods in the historic naval city.

Hundreds of shipyard workers and supporters filled the square outside Victoria Gate to protest at job losses announced last month by defence giant BAE systems. More than 900 jobs will be lost, although Portsmouth will retain repairs and maintenance work.

Unite national officer Ian Waddell said that although he expected the cuts would be final, unions wanted to send a clear message to government that shipbuilding jobs in Portsmouth and surrounding areas like Southampton needed to be protected.

About 830 jobs will also be lost at yards in Govan and Scotstoun on the River Clyde in Glasgow, at Rosyth in Fife, and at BAE's Filton office, near Bristol, as a result of the end of aircraft carrier work.