Sir Keir Starmer has warned China poses “real national security threats to the United Kingdom”.

But the prime minister also described China as a “nation of immense scale, ambition and ingenuity” and a “defining force in technology, trade and global governance”.

“The UK needs a China policy that recognises this reality,” he added in a speech at the Guildhall in London.

“Instead, for years we have blown hot and cold.

“So our response will not be driven by fear, nor softened by illusion. It will be grounded in strength, clarity and sober realism.”

Describing the absence of engagement with China – the world’s second-biggest economy – as “staggering” and “a dereliction of duty”, Sir Keir said: “This is not a question of balancing economic and security considerations. We don’t trade off security in one area, for a bit more economic access somewhere else.

“Protecting our security is non-negotiable – our first duty. But by taking tough steps to keep us secure, we enable ourselves to cooperate in other areas.”

Sir Keir’s remarks come after MPs and parliamentarians were warned last month of new attempts to spy on them by China.

And they follow the collapse of a prosecution of two people suspected of spying on behalf of China.

That case led to controversy over how the government under Labour responded to the Crown Prosecution Service’s requests for evidence.

At the time, Sir Keir sought to blame the previous Conservative government for the issues, which centred on whether China could be designated an “enemy” under First World War-era legislation.

Meanwhile, Sky News understands the prime minister is set to approve plans for a controversial Chinese “super embassy” in central London.

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A final decision on the planning application for the former Royal Mint site near the Tower of London is due on 10 December, after numerous previous delays.

Sir Keir is also understood to be preparing for a likely visit to China in the new year.

Since he was elected last year, Sir Keir has been active on the world stage, trumpeting deals with the US, India and the EU and leading the “coalition of the willing” in support of Ukraine.

But he has also faced criticism from his opponents, who accuse him of spending too much time out of the UK attending international summits rather than focusing on domestic issues.

Sir Keir offered a defence of his approach, describing it as “the biggest shift in British foreign policy since Brexit” and “a decisive move to face outward again”.

While saying he would “always respect” the Brexit vote as a “fair, democratic expression”, he said the way the UK’s departure from the EU had been “sold and delivered” was “simply wrong”.

He said: “Wild promises were made to the British people and not fulfilled. We are still dealing with the consequences today.”

In his speech on Monday, the prime minister accused opposition politicians of offering a “corrosive, inward-looking attitude” on international affairs.

Taking aim at those who advocate leaving the European Convention on Human Rights or NATO, he said they offered “grievance rather than hope” and “a declinist vision of a lesser Britain”.

Sir Keir said: “Moreover, it is a fatal misreading of the moment, ducking the fundamental challenge posed by a chaotic world – a world which is more dangerous and unstable than at any point for a generation, where international events reach directly into our lives, whether we like it or not.”

He added: “In these times, we deliver for Britain by looking outward with renewed purpose and pride, not by shrinking back. In these times, internationalism is patriotism.”

Responding to the prime minister’s speech, shadow foreign secretary Dame Priti Patel said: “From China’s continued flouting of economic rules to transnational repression of Hong Kongers in Britain, Starmer’s ‘reset’ with Beijing is a naive one-way street, which puts Britain at risk while Beijing gets everything it wants.

“Starmer continues to kowtow to China and is captivated by half-baked promises of trade.

“Coming just days after the latest Chinese plot to interfere in our democracy was exposed, his love letter to the Chinese Communist Party is a desperate ploy to generate economic growth following his budget of lies and is completely ill-judged.

“While China poses a clear threat to Britain, China continues to back Iran and Russia, and plots to undermine our institutions. Keir Starmer has become Beijing’s useful idiot in Britain.”

A girl has died and another has been seriously injured after a crash involving a minibus carrying nine teenagers.

North Yorkshire Police said it was investigating the collision involving a white Mercedes Sprinter minibus and a Hyundai car in Tadcaster.

The incident happened on Toulston Lane at the junction with Rudgate shortly before 12.30pm on Monday.

The minibus was carrying nine passengers aged 16 to 18, police said. One girl died at the scene.

Another teenage girl was taken to hospital by ambulance with serious injuries that are not believed to be life-threatening.

The other passengers and the man driving the minibus have received treatment at hospital for minor injuries.

The driver of the Hyundai, a 40-year-old woman, has been arrested in connection with the investigation.

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Police have appealed for witnesses and motorists with relevant dashcam footage to come forward.

Toulston Lane was closed to traffic as an investigation continued.

The chairman of the Office for Budget Responsibility (OBR) has resigned after an investigation into the leak of last week’s budget criticised the watchdog’s leadership.

Richard Hughes stepped down following the publication of a report into the early release of Rachel Reeves’s fiscal event.

The OBR’s official forecast, which revealed the contents of the record-breaking tax rise budget, was accessed at 11.35am last Wednesday, about an hour before the chancellor stood up to deliver it.

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In a letter to Ms Reeves and the chairwoman of the Commons Treasury Committee Dame Meg Hillier, Mr Hughes said he was quitting to allow the OBR to “quickly move on from this regrettable incident”.

He said he took “full responsibility” for “the shortcomings identified in the report”.

Mr Hughes said: “By implementing the recommendations in this report, I am certain the OBR can quickly regain and restore the confidence and esteem that it has earned through 15 years of rigorous, independent economic analysis.”

An investigation ordered by the independent fiscal forecaster soon after the budget called the leak “the worst failure in the 15-year history of the OBR” and strongly criticised the watchdog’s processes for protecting sensitive information.

The probe found there was “nothing to suggest” the premature access was the result of “hostile cyber activity by foreign actors or cyber criminals, or of connivance by anyone working for the OBR”.

“Nor was it simply a matter of pressing the publication button on a locally managed website too early,” the report stated.

It concluded that “configuration errors” led to “a failure to ensure the protections which hide documents from public view immediately before publication were in place”.

“The ultimate responsibility for the circumstances in which this vulnerability occurred and was then exposed rests, over the years, with the leadership of the OBR,” the investigation said.

Kemi Badenoch claimed that Ms Reeves was trying to use Mr Hughes as a “human shield”.

The Conservative leader said on social media: “More serious questions for the chancellor as she tries to make Richard Hughes her human shield.

“Her actions have turned this into a full blown political crisis for the government. If [Prime Minister] Keir Starmer had a backbone, he would have sacked Reeves long ago.”

Mr Hughes had been under pressure to explain the leak, which he immediately apologised for, and ordered the investigation.

It is also led by Professor David Miles and Tom Josephs, with Baroness Sarah Hogg and Dame Susan Rice as non-executive members.

There are 52 permanent staff, who are civil servants, with six of those working on the strategy, operations and communications team.

The report acknowledged the leak “changed the pattern of budget day to the chancellor’s disadvantage”.

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It revealed the OBR’s spring statement 2025 was also accessed ahead of time, but said the likely explanation “is benign”.

And it said last week’s budget forecast document had multiple attempts to access it before it was inadvertently made accessible online.

The investigation partly blamed the Treasury and the Cabinet Office, as the OBR’s IT services were moved on to the Treasury’s shared systems in 2023 to “align more closely with Treasury security arrangements”, particularly around the sharing of sensitive budget information between the OBR and Treasury.

It said the Treasury should pay “greater attention” when setting the OBR’s budget, currently £6.4m, to the need for adequate support.

The investigation said there was pressure on the small team involved to ensure the full economic and fiscal outlook was published when the chancellor sat down after giving her budget, so a pre-publication “facility” was used.

But this commonly used device created a “potential vulnerability if not configured properly” and had not received the same amount of attention by the OBR as it had placed on security of communications with the Treasury “during the long period of run-up to the budget”.

An outside web developer, who has helped the OBR team since it came into existence 15 years ago, assists the internal team and manages content and uploads at times of pressure, including the release of the budget forecast.

The report said the risks of this approach have increased over the years as technologies have developed and online threats have risen.

“With hindsight, it is clear that over the years this arrangement should have been regularly reexamined and assessed by the management of the OBR,” the report said.

It recommended the process for publishing forecasts should “immediately” be removed from the OBR’s locally managed website, which is a WordPress website, and published as part of a government website.