Sir Keir Starmer will only walk the defense spending with 0.2 percent of GDP, indicated a cabinet minister on Sunday.
Education secretary Bridget Phillipson said that Labor's Manifesto promise to walk at 2.5 percent was an 'ambitious' target.
She suggested that it will not be raised higher despite growing calls to do this.
Groot -Britain currently spent 2.3 percent of GDP on Defense, equal to £ 54 billion. It would cost about a year extra £ 6 billion a year to walk to 2.5 percent.
Mrs Phillipson's comments meant a speech by Sir Keir Starmer on Sunday in which he insisted that 'Peace is only through strength' fell flat.
During the annual conference of the Scottish Labor Party, the prime minister said that Great -Britain will play a 'leading' role in the Ukrainian war and that it was time to 'take responsibility for our safety, our continent' and 'more' by doing through Expenses to walk defense.
But current and ex-military leaders have warned that any rise in defense expenditure must increase to increase more 3 to 3.5 percent of GDP, given the scale of global instability and warnings from the US that support will withdraw.
NATO chef Mark Rutte said that allies of the Western military alliance should spend 'considerably more' than 3 percent, while US President Donald Trump has summoned 5 percent.

Education secretary Bridget Phillipson said that Labor's objective for increasing defense expenditure up to 2.5 percent of GDP was 'ambitious' and suggested that the government would not invest higher than that

Sir Keir Starmer said yesterday in a speech in Glasgow that 'peace only comes through strength'
However, when it was repeatedly asked whether the expenditure above 2.5 percent can be stimulated because the target is' not enough ', Mrs. Phillipson told the BBC:' We will spend much more on defense
“And our allies must also get up. But let's be clear, 2.5 percent is ambitious. We will come there, but it is ambitious. '
She refused to turn off the timetable for when it will be reached.
There is a growing speculation that Sir Keir will use a trip to Washington on Thursday for conversations with Mr. Trump to announce the timetable for stimulating the defense expenditure.
In his manifesto, the party promised to increase it to 2.5 percent, but has failed since the elections last July to turn off a timetable.
The tories, on the other hand, said they would do it by 2030.
Sir Keir said during the Glasgow conference on Sunday: 'Peace is only through strength.
'Nobody wants the bloodshed to continue, nobody, the least, the Ukrainians.
“But after all they have suffered, after everything they fought for, there could be no discussion about Ukraine without Ukraine and the people of Ukraine must have a long -term, secure future.”
This was a reference to the fact that Ukraine was sidelined last week of peace talks, which will start last week between the United States and Russia in Saudi Arabia.
Sir Keir added: 'While we enter a new phase in this conflict, we now have to deepen our solidarity.
“It is not just moral urgency that requires this. It is also in our national interest. Russia is already threatening our waters, our online spaces, even sometimes, our streets … I have been saying for a while that we Europeans, including the United Kingdom, have to do more for our defense and safety.

Ukrainian President Volodyymyr Zenskyy. Sir Keir said that every discussion about the future of Ukraine must include Ukraine, because the country was sidelined last week of peace talks between the US and Russia
'The US is right about this in this new era. We cannot stick to the comfort of the past.
“It is time to take responsibility for our safety, our continent, and I am clear that Great -Britain will take a leading responsibility.”
Repeating his promise to use British troops in Ukraine to monitor a cease -the side -he added: 'We must be ready to play our role as one [peacekeeping Army] Force is required in Ukraine as soon as a peace agreement has been reached.
“And we must be ready to reform our economy with industrial policy, to stand up for Ukraine, to stand up for Europe, but especially to stand up for our safety because Ukraine is vital for us.”
Most government services have been asked to model the cutbacks to a maximum of 11 percent in an attempt to find the money to stimulate the defense.