The Conservatives have called for the forthcoming public inquiry into the Southport murders to consider why the police, prosecutors and government did not make public more details about the killer last summer before his trial.

Home Secretary Yvette Cooper and Prime Minister Sir Keir Starmer have both said the government could not have risked Axel Radukabana walking free by ignoring advice that publishing information could have jeopardised his trial.

But Conservative shadow home secretary Chris Philp said it was likely an “information vacuum” had resulted in misinformation which “fuelled” the riots which followed the Southport attack.

He asked why the discovery of ricin and a copy of an al-Qaeda training manual in Radukabana’s house could not have been swiftly revealed.

Cooper said the government had wanted to make public that Radukabana had been referred to the counter-extremism programme Prevent, but could not because of legal advice.

Rudakubana was charged with three counts of murder and 10 of attempted murder on 31 July, shortly after launching his attack which killed Bebe King, six, Elsie Dot Stancombe, seven, and Alice da Silva Aguiar, nine.

Within days, in early August, officers searching Rudakubana’s home found ricin and a file entitled “Military Studies in the Jihad against the Tyrants, the Al Qaeda training manual”.

The government was kept up-to-date about the discovery. The BBC has been told the ricin was in a Tupperware box in his bedroom.

Police rarely give details of an ongoing investigation without what they describe as a “policing purpose”.

In this case, false rumours were spreading online about the killer, including that he had migrated to Britain.

Senior officers felt under pressure to reassure the public, and dispel some of the rumours about the suspect by making clear he was in fact British.

But after discovering the ricin and manual they did not immediately make this public.

The investigation continued, with searches taking weeks because of the need for teams to wear hazmat suits and take a break every 40 minutes.

As they prepared to announce the outcome to the investigation, senior police officers became frustrated that the Crown Prosecution Service (CPS) was advising them to withhold many details they felt should be made public, due to false claims online.

The killer was not charged with production of a biological weapon, and possession of information likely to be useful for terrorism, until 29 October 2024.

Sources close to the handling of the case say police wanted to announce these charges and reveal the discovery of the ricin and manual 11 days earlier, on 18 October, but there was a hold-up as the CPS and the police negotiated over what could be said publicly.

A source said the CPS “put a load of red pen through the statement”.

Rudakubana was finally charged with the additional two offences on 29 October.

It was at this point, three months after the Southport attacks, that police made public for the first time that the ricin and manual had been found.

He was not charged with preparing for acts of terrorism, because under current laws this would involve finding evidence of a political motivation or ideology, and none had been found.

The prime minister suggested on Tuesday the laws defining terrorism might need to change to take account of lone attackers without a clear motivation.

Rudakubana has now pleaded guilty to all the charges he faced and will be sentenced on Thursday.

Normally the risk of jeopardising the case falls away once all charges have been decided, either by a plea, or a jury reaching a verdict.

Crime reporters attended a police and CPS-led briefing setting out the entire case – but on Monday, the CPS again decided the information should not be published, this time until after the sentencing.

Despite that, the prime minister and home secretary have both given details about the case in the Commons.

Sir Keir Starmer’s deputy official spokesperson told political reporters on Tuesday afternoon that the prime minister had “not strayed” into areas related to sentencing.

Yet the CPS insists it needs to protect the sentencing process due to take place on Thursday.

Nick Price, CPS director of legal services, said: “The next stage of the process is for the prosecution to present our full case to the court on Thursday – including relevant details of the defendant’s past – so the judge can consider all the evidence when passing sentence.

“This will be the point when the full details of this case will be heard by the public.

“We recognise the profound interest in these proceedings, and it is important the prosecution case is presented to the court so the facts can be determined which may inform the sentence handed down.”

The CPS has taken this position because it believes the judge is entitled to make factual findings about the case and must also determine what weight to attach to different aspects of the evidence.

However, the Crime Reporters Association, representing around 50 senior crime and home affairs correspondents, has written to the CPS raising concerns that the service is breaching a long-established principle that there is no legal risk in publishing material about a case after guilty pleas and before sentencing.

The CPS said in its response that the “independence of the judge must be respected”.

OpenAI is teaming up with Oracle and Softbank to build data centres equipped to power artificial intelligence (AI), with plans to invest $100bn “immediately”.

Flanked by the bosses of the three companies at the White House, US President Donald Trump said the plan is a “resounding declaration of confidence in America’s potential”.

OpenAI has previously called for major investments in infrastructure to support AI and pushed for government support of those plans.

The ChatGPT-creator and Softbank said the joint venture, dubbed Stargate, intends to invest $500bn over the next four years.

“I think this will be the most important project of this era,” said OpenAI’s chief executive, Sam Altman.

“We wouldn’t be able to do this without you, Mr President,” he added, crediting Trump despite work on the project already being under way.

The plan, which involves the construction of AI infrastructure such as data centres, is expected to create more than 100,000 jobs, according to Trump.

Oracle’s chief technology office, Larry Ellison, said the first data centres are under construction in Texas and more will be built in other locations.

The Information, a technology news website, first reported on the project in March last year.

OpenAI said the announcement of the new company, which also includes UAE-backed investor MGX, was the culmination of more than a year’s worth of conversations.

Other partners in the project include tech giants Microsoft, Arm and NVIDIA, according to statements by Softbank and OpenAI.

OpenAI kicked off the AI race in 2022 with the launch of its ChatGPT bot, which offered lifelike responses to questions and showcased the rapid advances in the technology.

It has prompted a gush of investment, including in the specialised data centres needed to power the computing.

But the projected surge in demand for the centres, which will require huge amounts of power to run and money to be built, has raised concerns about the impact on energy supplies and questions about the role of foreign investors.

In one of his final acts in the White House, former President Joe Biden put forward rules that would restrict exports of AI-related chips to dozens of countries around the world, saying the move would help the US control the industry.

He also issued orders related to the development of data centres on government land, which spotlighted a role for clean energy in powering the centres.

The latest investment plans are not unusual in the context of the industry.

Microsoft, one of the OpenAI’s major backers, said earlier this month it was on track to invest $80bn to build out AI-powered data centres this year.

It is also involved in a $100bn venture that includes BackRock and is focused on making AI data centre investments.

Amazon has been pouring money into the space at a similar scale, announcing two projects worth about $10bn each just in the last two months.

In a report last year, McKinsey said that global demand for data centre capacity would more than triple by 2030, growing between 19% and 27% annually by 2030.

For developers to meet that demand, the consultancy estimated that at least twice the capacity would have to be built by 2030 as has been constructed since 2000.

But analysts have warned that the process is likely to be bogged down by issues such as power and land constraints and permitting.

Donald Trump has signed sweeping executive orders on his return to the US presidency, vowing swift action on some of his top campaign issues.

Among the directives that have gained the most publicity are an immigration crackdown and rollbacks of some climate-friendly policies.

But even presidential powers have their limits – and in some cases, he faces hurdles before his plans can become reality.

By Bernd Debusmann Jr, at the White House

What does the order say?

The order argues that cartels have “engaged in a campaign of violence and terror” throughout the hemisphere, and flooded the US with crime, posing a national security risk to the US.

Additionally, the order specifies that the US policy is to “ensure the total elimination” of these groups in the US. It gives US agencies 14 days to provide recommendations on which groups are to be designated and be ready to expedite the removal of individuals from the US.

What are the roadblocks?

Designating a cartel as a terrorist group could open the door to prosecuting US citizens or even legitimate businesses found to be somehow tied to those groups. The designation could also strain relations with countries including Mexico, which has vocally called for its sovereignty to be respected.

What is the potential impact?

For one, the designation of these groups as foreign terrorist organisations could ultimately be used to justify military action against targets in Mexico or other countries in which similar groups operate.

The designation could also see the US federal government dedicate more resources and enhanced legal tools to fight cartels and other gangs, and go after their business and financial interests on both sides of the border.

While it would make “material support” of these groups a crime, it remains unclear what that could mean. In theory, that could mean that drug dealers and users, including US citizens, could be charged with aiding terrorists – as could US citizens or businesses on the border that are extorted to pay them.

By Nadine Yousif, Toronto

What does the order say?

The executive order asks the US ambassador to the UN to “immediately” submit a formal written request to withdraw from the Paris agreement.

It says the accord does not reflect the country’s values or its economic and environmental objectives.

What are the roadblocks?

Any country can withdraw from the global climate pact, but UN regulations mean the process of removing a country can be drawn out.

Trump announced his intent to withdraw during his last term in 2017, but it was not formally finalised until 2020. We can expect another waiting period this time of at least one year.

President Joe Biden rejoined it shortly after taking office in 2021

What is the potential impact?

The US is responsible for around 11% of global greenhouse gas emissions, making it the second biggest polluter behind China. This damages the global effort to limit emissions.

Its withdrawal in the past has raised issues of trust on climate leadership, and questions about whether the agreement itself has been effective.

The withdrawal is also in line with Trump’s goal to boost domestic oil and gas production, though the US is already the number one producer of both in the world. It is one of several of Trump’s reversals of environmental protections that were enacted by the Biden administration.

By Jake Horton, BBC Verify

What does the order say?

This order aims to end birth right citizenship for children born in the US to immigrant parents who are in the country illegally, as well as those born to parents who are in the country on a temporary basis.

There have been reports that the administration will enforce the order by withholding documents, such as passports, from people it deems ineligible for citizenship.

What are the roadblocks?

The principle of birthright citizenship is established in the US Constitution. The 14th Amendment says that “all persons born or naturalized in the United States” are citizens of the United States.

The legal challenges are already under way – one claims the order is “unconstitutional, and flouts fundamental American values”.

“Ultimately this will be decided by the courts. This is not something [Trump] can decide on his own,” Saikrishna Prakash, a constitutional expert, told the BBC.

What is the potential impact?

Trump has threatened mass deportations, which could include those whose birthright citizenship is revoked if Trump is successful in enforcing this executive action.

Legal cases could ultimately have to be decided by the US Supreme Court, which could take a long time.

By Dominic Hughes, health correspondent

What does the order say?

The order says the US was withdrawing “due to the organization’s mishandling of the Covid-19 pandemic”.

Trump’s longheld antipathy towards the WHO is rooted in a perception that it was dominated by – and so soft on – China, which the president has long believed was responsible for the spread of the virus.

It also mentions “unfairly onerous payments” the US made to the WHO.

What are the roadblocks?

It is the second time Trump has ordered the US be pulled out of the WHO. He began the process and Biden later reversed the decision after taking office.

The US exit won’t take effect until 2026 at the earliest, but leaving will require the approval of Congress.

On paper, the Republicans have a majority in both houses of Congress. But their numerical advantage is slim, and it would only take a few Republican defectors to potentially block the move.

What is the potential impact?

“Catastrophic”, “disastrous”, “damaging” is how some global public health experts are describing it.

Of the 196 member states, the US is by far the largest individual funder, contributing almost a fifth of the total WHO budget.

It’s possible that funding could disappear almost overnight and that could have an impact on the ability of the WHO to respond to emergencies.

There is also concern among some scientists that this would leave the US isolated when it comes to access to programmes such as pandemic preparedness and seasonal influenza strain sequencing, which is used to develop annual flu jabs.

That could ultimately harm the health of Americans, and the US national interest.

Some argue US withdrawal could prompt further reforms of how the WHO works, making it a body that better serves the public health needs of people around the globe.

By Jake Horton, BBC Verify

What does the order say?

The order calls for the Gulf of Mexico to “officially be renamed the Gulf of America”.

Trump can change the name of the Gulf on official US government documents.

This has happened on some documents already – including a weather update from Florida’s Republican Governor Ron DeSantis, which refers to “an area of low pressure moving across the Gulf of America”.

What are the roadblocks?

Trump can’t force other countries or companies to change the name.

For example, it’s currently still labelled as the Gulf of Mexico on Google Maps.

What is the potential impact?

There’s no formal international agreement for the naming of maritime areas – although there is a body that seeks to resolve disputes if raised.

So Mexico could raise an official dispute, and allies of the US and Mexico could be caught up in a diplomatic spat between the two countries.

In response to the order, Mexico’s President Claudia Sheinbaum said the US can call it the “Gulf of America”, but this won’t change what Mexico and the rest of the world call it.

By Ben Chu and Lucy Gilder, BBC Verify

What does the order say?

“It is the policy of the United States to recognize two sexes, male and female. These sexes are not changeable and are grounded in fundamental and incontrovertible reality,” it says, adding that the federal government will use the term sex, not gender.

President Trump’s team argues that requirements to refer to transgender people in government facilities and workplaces by pronouns that match their gender identity violates the US Constitution’s First Amendment on freedom of speech and religion.

States like Kansas and Montana have already legislated to enshrine a biological definition of sex into law.

What are the roadblocks?

There are likely to be legal challenges.

The Human Rights Campaign, which represents LGBTQ+ people, stated that “we will fight back against these harmful provisions with everything we’ve got”.

These challenges could work their way up to the US Supreme Court which, with its conservative majority, could rule in Trump’s favour.

What is the potential impact?

Prisons and settings such as shelters for migrants and rape victims would be segregated by sex under the plans, which campaigners say will help safeguard women. But transgender rights groups say trans women could be put at a heightened risk of violence.

Official identification documents, including passports and visas, would have to state whether the individual was “male” or female”. US citizens would no longer be able to select “X” as a third option.