Mr Hammond and Mr Le Drian visited French aircraft carrier the Charles de Gaulle, then were briefed by officers at HMS Bulwark.
Mr Hammond said the exercise was symbolic of the promise made in 2010.
It's a real, concrete delivery of that collaboration in the form of an enhanced military capability that gives our two countries additional force, additional capabilities to project military power in support of our national policies and international obligations.
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Journalists and well-wishers are once again watching the entrance to the maternity wing of a hospital waiting for something to happen.
Cloud and some springtime sunshine
Details of the new arrival were released by Kensington Palace.