Donald Trump’s suggested the US could restart explosive tests of nuclear weapons, after more than 30 years. Is this a symptom of a nuclear arms race already underway, or could it kickstart one?

William Alberque, who has played a leading role in NATO’s nuclear policies, and Jon Wolfsthal who advised President Obama, share their thoughts on whether the US is about to break a global ban on detonations, and what that could mean for us all.

Sitrep also explains how atomic weapons have been tested and verified, without explosions, since the 1990s.

And as the UK develops a new nuclear warhead in parallel with the US, Professor Michael Clarke assesses whether any testing row could drag Britain in by association. 

The multibillion-pound deal to deliver nuclear powered submarines for the UK and Australia is facing questions just four years into the decades long plan.

In the UK there are amber and red warnings for building the boats and propulsion systems, for its part the US is struggling to build enough Virginia class subs, and Australia faces a monumental challenge to be ready for its first nuclear vessels.

So will the Royal Navy be asked to do more in the Pacific for longer, while also having to wait for gaps in its submarine capability to be filled?

Kate and Mike are joined by former Royal Navy Commander Tom Sharpe and senior defence researcher Sophia Gaston to assess the risks, the potential consequences, and how they could be avoided or at least mitigated.

Mike and Sian talk to Bernard Cornwell, creator of Napoleonic Wars Rifleman Richard Sharpe and Uhtred, the unforgettable hero of the Last Kingdom series.

Bernard tells Sitrep about the 25th Sharpe novel, Sharpe’s Storm, his admiration for today’s armed forces and why he wouldn’t want to write about any modern day conflicts.

He also reveals he’s writing a new book about Uhtred and lifts the lid on whether his latest book is the final ever Sharpe novel.

(This podcast contains some strong language)

Three and a half years into Ukraine’s fight for survival against Russia, it has offered to freeze the front lines in return for peace talks. 

But Russia’s not biting, so Sitrep explains where those front lines are right now and where the military momentum is pressing hardest, to understand where the war might go next as winter approaches.

Ukrainian journalist Roman Pahulych shares insights from his time with troops close to the front lines while John Foreman, former Defence Attaché to Kyiv, explains how new sanctions could still bite at Moscow’s military capabilities.

The blueprint for the UK’s Armed Forces depends on data from every military sensor being available to every person who needs it.

Whether the information comes from the battlefield, space, or cyberspace, and whether it’s required at the front-line, PJHQ, in a cockpit or deep in the ocean.

The Digital Targeting Web is meant to be up and running in the next couple of years, but how will it work and what will it mean for troops at the sharp end?

Also on Sitrep what difference could US Tomahawk cruise missiles make to Ukraine, as President Trump hints he might be prepared to supply “the Daddy of missiles”?

And as the US Navy celebrates its 250th birthday a Royal Navy veteran, who spent two years on exchange, tells us what makes the American maritime force tick.

The government has promised thousands of drones will make the armed forces stronger and safer, but is refusing to say how many of them it’s ordered over the last year.

Professor Michael Clarke analyses the numbers that are available and explains why Ukraine shouldn’t be treated as a template for the future, even though drones are here to stay.

Sitrep also talks to the new Veterans & Defence People Minister, Louise Sandher-Jones, about how she plans to tackle accommodation and recruitment problems from her own experience of service.

And Brigadier Ben Barry tells us about joining the dots of his career for his new book, chronicling the rise and fall of the army over the last 50 years.

After a 37 year career in the Army Brigadier Ben Barry became one of the UK’s most respected land warfare researchers and analysts.

Now he’s drawn together his experiences in and out of uniform to write a new history of the British Army over the last half century.

It tells the stories not just of the major operations and battles but also big exercises, and plans which came to nothing.

He tells Kate Gerbeau how it helped him join the dots to understand not only the successes and failures of given moments, but to see the whole arc and how that could help the Army rise again to face the next 50 years.

As well as condemning “fat” generals and “woke” policies US Secretary of Defense, Pete Hegseth, has told America’s top officers they must end a ‘poisonous culture of risk aversion’.

Sitrep separates the warfighting logic from the culture-war politics and assesses whether UK defence could benefit from being prepared to take greater risks.

We also examine the cost of silence for special forces, and explain how their bond of secrecy could stand in the way of getting mental health help.

And as the largest collection of Victoria Crosses is taken off display, to make way for other museum exhibits, retired Major General Tim Cross and historian Lucy Betteridge-Dyson discuss how best preserve the stories of gallantry behind these medals. 

The Foreign Secretary says we will “confront” Russian planes after repeated invasions of NATO airspace. Donald Trump says they should be shot down.

Sitrep talks to former RAF pilot Air Marshal Greg Bagwell about how intercepts are carried out, the options for pilots, and the risks involved.

Kate and Mike also talk to Keir Giles, who advises governments on Moscow’s military mindset, about what it hoped to achieve with drones over Poland, and fighter jets in Estonian airspace.

And after President Trump’s big U-turn any hope of Ukraine peace talks appears to be over, so Mike explains what both sides are planning for the next phase of the war.

RAF Typhoons join an air defence operation following Russian incursions into Polish and Romanian airspace. They’ll work with allied forces, including France, and Germany, helping to defend the eastern flank as part of Nato's Eastern Sentry. Sitrep digs deep with Forces News reporter Simon Newton.

Also President Trump’s state visit to the UK is breaking military ceremonial records.  Sitrep talks to General Sir Nick Parker, former deputy commander of ISAF, about how intertwined UK forces are with US ones.

And as world events are brought directly to our mobile devices Sitrep speaks to the author of a book looking at how the military must adapt to fighting wars with the smartphone.

Kate Gerbeau presents, with expert analysis from Dr Karin von Hippel.