Portsmouth City Council is fighting to keep shipbuilding in the city by backing an online petition.
BAE Systems announced the end of shipbuilding in Portsmouth with the loss of 940 jobs. Protestors say another 2,000 jobs in the area could be lost from suppliers who are dependent on the shipyard.
Cllr Vernon-Jackson is forming a task group to tackle the consequences of the shipbuilding decision, and local leaders have also asked for government support for this.
I talked to Dr Cable about the shipyard issue and what we can do to try to protect jobs. One idea I want the government to consider is that one of the Royal Navy's three new offshore patrol vessels could be built in Portsmouth.
1800 jobs will be cut in shipyards operated by BAE Systems across England and Wales, bringing shipbuilding in Portsmouth to an end.
Unions are to meet defence giant BAe Systems to discuss the future of the firm's three shipyards amid a review of its business.