Mike Hancock, the MP for Portsmouth South, was at the city's rally today. He was there to support demonstrators hoping to save 940 BAE jobs. The cuts were announced earlier this week.
The heavy blow of hundreds of job losses in Scottish shipbuilding has been softened by the announcement of new contracts that will keep operations in Govan going for more than two decades.
Scotland Correspondent Debi Edward reports on the response from the shipbuilders on a decision that politically protects those campaigning against Scottish independence ahead of next year's referendum.
Labour leader Ed Miliband has said he does not believe the Scottish referendum played a part in the decision to continue shipbuilding in Scotland while closing the Portsmouth yard.
Mr Miliband supported the Government in its claim that the retention of Scottish jobs was for defence reasons only.
The leader of Portsmouth City Council has said the decision to shut down the city's shipyard, which is the only one in England able to build advanced surface warships, smacks of politics.
– Council leader Gerald Vernon-Jackson
The remaining yards with the capability to build advanced warships are in Scotland, and the referendum on Scottish independence is less than one year away. Ministers have put the defence of the UK and the future of the Navy at real risk.
Portsmouth Conservative councillor Alistair Thompson added: "Many of those who I represent as a councillor are hugely concerned that this decision has been taken for political reasons because of the referendum in Scotland next year."
Scottish Deputy First Minister Nicola Sturgeon has played down the impact of next year's referendum on the decision to maintain shipbuilding in Scotland, while operations will come to an end in Portsmouth.
– Deputy First Minister Nicola Sturgeon
The Clyde has won these contracts because it's the best place to build the frigates. That won't change with independence.
I've just heard Philip Hammond in the House of Commons confirm what BAE said this morning, that the Clyde was the most effective and value-for-money place to build the contract. That's the reality and I mean no disrespect to Portsmouth about that.
There's been an investment in the Clyde in recent years. The skill mix in the Clyde means that that's the best place to build these ships.
Scotland's Deputy First Minister Nicola Sturgeon has said she is "sorry" to see the end of shipbuilding in Portsmouth and described the loss of 800 jobs across Scottish yards as a "significant and devastating blow" to the country's workers.
Ms Sturgeon, though, said the Scottish government "welcomed" BAE Systems' decision to continue to build in Clyde, which she said reflects the "workforce's world-class expertise and skills mix".
She said the government will work with the firm and with those who face redundancy to try to find them alternative work after the mass axing.
While some Scottish jobs remain, Ms Sturgeon added: "We recognise the disappointment that faces shipbuilders in Portsmouth."
Secretary of State for Defence, Philip Hammond told MPs in the House of Commons that the loss of 1,775 jobs at BAE Systems was "regrettable but inevitable."