Compared to any other moment in history, Britain faces a "new era of threats" that changes the nature of war by drones, artificial intelligence and other technologies.

The 130-page document written by Prime Minister Keir Starmer will warn of the "direct and urgent" dangers posed by Russia and hope to try to learn from the Ukrainian war.

However, it will also focus on China, rather than being described as an enemy, but rather “a complex and lasting challenge”, sometimes willing to work with Moscow, and two smaller “regional disruptors” – Iran and North Korea.

It will portray the highest military and security threats since the end of the Cold War, although it does not say that the intensity of Moscow's cyber and sabotage means that Britain has already fought with Russia.

Analysis jointly proposed by a team led by former NATO Secretary-General George Robertson is not expected to make new commitments to defense spending. Instead, it will reiterate Starmer's commitment in February to increase the defense budget to 2.5% by 2027 and propose 3% in the next parliament.

However, it could be used to help justify a significant expansion of defence spending in the medium term, with a deal expected to be reached at the NATO summit in late June, which could actually exceed £50 billion.

Members of the Western Union are discussing a proposal to increase core defense spending to 3.5% of GDP by 2032, and another 1.5% of Donald Trump’s pressure on the network and infrastructure initiatives.

NATO Secretary-General Mark Rutte said this week that he expects the summit in The Hague in June will bring allies to agree to a "high defense spending target" of 5% in total, including a number of "a considerable 3% north" on pure defense spending.

The Ministry of Defense and Treasury have been fighting for whether to include a commitment to increase the number from the target of 73,000 to 73,000.

The figures for this week show that the size of the army has dropped to its target’s lowest level since the Napoleonic era, and on April 1, the number of soldiers trained full-time was 70,860, down 2.3% from the previous year.

Defense Secretary John Healey, a critic of opposing the decline in the military, won a promise to add thousands of troops to the army, but the Defense Department said it does not acknowledge the speculation.

If recruiting can be achieved, the promise of adding 5,000 to the Army's population will cost about £2.5 billion annually for additional salary, accommodation, toolkits and other resources. But if successful, this will help the military meet things that may increase overseas commitments in the coming years.

Britain and France have agreed to lead multinational companies of up to 30,000 people "reassured forces" to help keep Ukraine peaceful and sign a lasting ceasefire in Russia, which Russia has signed, despite Vladimir Putin's willingness to do so.

Peter Ricketts, a former national security adviser, said that while it makes sense for the Mod to spend more money on drones, network capabilities and artificial intelligence, “another lesson in Ukraine is that the population size is ultimately necessary 3.5% of GDP resources in terms of human and equipment.

The Ministry of Defense will allocate an additional £1.5 billion to improve military accommodation, including an emergency upgrade of 1,000 worst homes, while plans will be made to create a volunteer family guard to protect airports and other sensitive locations from drones or other accidental attacks, subject to hostile countries and terrorists.

Other members of the review panel are retired Sir Richard Barrons and Sir Fiona Hill, a former former adviser to Donald Trump, who had previously said that World War III had begun “structurally” as Russia was eroded by Russian norms of conduct in the fight against Ukraine and the Middle East.

The group chairman Lord Robertson previously described Russia, China, North Korea and Iran as "deadly quartets" of increasingly collaborative cooperation. Iran has become Russia's drone supplier, while China provides components for weapons - North Korea has sent troops to fight Ukraine.

Starmer is expected to release an outline review at an event on Monday, and Healey then submits the full document to Parliament.