Should Britain and France share defence strategy?
One centre will be set up in the UK to develop nuclear testing technology and another in France to carry it out. £750m will also be saved over four years on the Trident nuclear missile system by cutting the number of warheads.
Downing Street called the measures "practical", but Labour said they left "big questions" over the UK's defences.
Can the UK and France work together? Are shared defence strategies a good idea? Should more countries join forces on defence?
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