Sir Keir Starmer said the UK is acceptable to summation spending connected defence, information and resilience to 5% of GDP by 2035 to conscionable an "era of extremist uncertainty" - but without promising immoderate further cash.
The determination - portion of a caller spending pledge by the NATO confederation - was panned arsenic deceptive "smoke and mirrors" by critics, who pointed to the precise existent hazard of escalating struggle betwixt Iran, the US and Israel, arsenic good arsenic Russia's full-scale warfare successful Ukraine.
Volodymyr Zelenskyy told Sky News the timeline for the summation was "very slow" and warned Russia could onslaught a NATO state wrong 5 years.
"In my view, this is dilatory due to the fact that we judge that starting from 2030, Putin tin person importantly greater capabilities," helium told chief presenter Mark Austin.
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The premier minister, Donald Trump and the different leaders of NATO's 32 subordinate states are expected to o.k. the concern extremity erstwhile they conscionable astatine a acme successful The Hague, which opens aboriginal today.
It replaces a erstwhile people to walk 2% of GDP purely connected defence.
The announcement volition beryllium celebrated arsenic a triumph for the US president, who has been demanding his allies walk much connected their ain defences alternatively of relying connected American firepower.
Overnight, helium claimed to person secured different success, declaring that Iran and Israel person agreed to a ceasefire - conscionable hours aft Iran launched missiles against 2 American subject bases successful retaliation to a US determination to onslaught 3 Iranian atomic sites implicit the weekend.
Perhaps it volition mean helium volition power attraction backmost to achieving a extremity to extremity Russia's warfare successful Ukraine, which volition beryllium different cardinal absorption of the gathering successful the Dutch capital.
NATO planners person crunched the acme down to a abbreviated main league tomorrow, with a last communique overmuch briefer than accustomed - each steps designed to trim the accidental of the US president leaving early.
He is already scheduled to get precocious and past this evening, provided helium turns up.
There is immense nervousness astir Mr Trump's committedness to an confederation that has been the bedrock of European information since it was founded much than 75 years ago.
He is not a instrumentality though, and has antecedently accused Europe and Canada of an overreliance connected American firepower for their ain security, calling for them to bash much to support themselves.
This unit has arguably been a bigger motivator successful prompting definite allies to hold to walk much connected their militaries than the menace they accidental is posed by Russia, Iran, China and North Korea.
Spain's presumption could make friction this week. The Spanish premier minister, portion agreeing to the caller concern goal, has said his state is not obliged to conscionable it.
The UK was besides dilatory to accidental yes - a stance that was astatine likelihood with a defence reappraisal endorsed by Sir Keir that was centred astir a "NATO-first" policy.
As good arsenic agreeing to the defence and information concern goal, the British authorities is besides publishing a caller nationalist information strategy connected Tuesday that volition item the value of a wider explanation of what constitutes security, including energy, nutrient and borders.
There volition besides beryllium a absorption connected a whole-of-society attack to resilience successful an echo of the UK's Cold War past.
It described the committedness to put successful defence, information and nationalist resilience arsenic an aligning of "national information objectives and plans for economical maturation successful a mode not seen since 1945".
Sir Keir said: "We indispensable navigate this epoch of extremist uncertainty with agility, velocity and a clear-eyed consciousness of the nationalist involvement to present information for moving radical and support them safe.
"That's wherefore I person made the committedness to walk 5% of GDP connected nationalist security. This is an accidental to deepen our committedness to NATO and thrust greater concern successful the nation's wider information and resilience."
The backing volition beryllium split, with 3.5% of GDP going connected halfway defence and 1.5% connected homeland information and nationalist resilience - a caller and truthful acold little intelligibly defined criteria.
Progress connected concern volition beryllium reviewed successful 2029.
The defence extremity is higher than the government's existent ambition to assistance defence expenditure to 3% of GDP by 2034, from 2.3% currently.
The lone coagulated committedness is to walk 2.6% connected defence by 2027 - a fig that has been boosted by the summation of the full of the fund for the quality agencies.
This level of quality spending had not antecedently been included and has drawn disapproval from defence experts due to the fact that it is not the aforesaid arsenic tanks, artillery and troops.
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The government, successful its statement, is present focusing connected an adjacent higher-sounding number, claiming that it volition deed 4.1% of the caller NATO people by 2027.
However, this is simply based connected adding the caller 1.5% spending extremity for "resilience and security" to the already stated 2.6% defence spending pledge.
A Downing Street spokesperson was incapable instantly to accidental however overmuch of GDP is presently spent connected immoderate is included successful the caller resilience category.
It could see pre-announced concern successful civilian atomic vigor arsenic good arsenic infrastructure projects specified arsenic roads and railways.
For the UK, 1.5% of GDP is astir £40bn - a important chunk of nationalist income.
Sir Ben Wallace, a erstwhile Conservative defence secretary, accused the authorities of "spin" implicit its spending pledge due to the fact that it does not see immoderate caller wealth anytime soon.
"The menace to our state is existent not spin," helium told Sky News.
"This authorities thinks it tin usage fume and mirrors to deceive the nationalist and Donald Trump. This is an insult to our troops who volition spot nary important caller money. It fools nary one."