Defence Secretary Philip Hammond said Britain and France are "natural partners for defence co-operation" after the Prime Minister announced a series of deals.
Mr Hammond said in a statement:
We have made substantial progress since the Lancaster House Treaty was signed in 2010 and today we have committed ourselves to go further still.
The agreements we have reached at this Summit will improve the inter-operability of our forces, enhance our joint equipment procurement and build on our capacity to support security and stability in places such as Libya, Mali and the Central African Republic.
More top news
Experts have warned that Ash dieback's impact on millions of trees could have serious consequences for the landscape and wildlife.
White House officials said that the US intelligence community has confirmed the death of Afghan Taliban leader Mullah Omar.
Jamie Oliver and health experts have been asked to help the Government in tackling the problem of obesity in primary school children.