Sir Keir Starmer says the UK has to be prepared for war to be able to deter potential enemies.
The outgoing Prime Minister's set out a 15-billion pound boost for defence spending - but acknowledged some road and energy projects would have to be scrapped to pay for it.
The plan includes not replacing aging naval Destroyers, instead using cheaper controlling ships and a fleet of unmanned drone vessels.
Critics have said government investment in defence is too little, too late and more needs to be done to modernise the UKs armed forces.
But the Prime Minister is confident the plan will keep the country safe…
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