Matthew Savill

Director of Military Sciences at the Royal United Services Institute @RUSI_org; recovering former civil servant; all views expressed here are my own.

[Jerome Starkey @jeromestarkey]

Remembrance onboard @HMSPWLS today, at the Atlantic Future Forum #AFF2026

[Deborah Haynes @haynesdeborah]

🚨 NATO confirms the senior US soldier arrested by UK counter terrorism police over allegations of espionage related to Russia was assigned to the alliance’s UK-led Allied Rapid Reaction Corps, which is headquartered at Imjin barracks in Gloucestershire

https://t.co/MSI0k7jIaq

[RUSI @RUSI_org]

📺RUSI's @LouMarieHSD spoke to @TimesRadio about why the UK needs to build “intelligence and operational frameworks” beyond Europe. Watch the full interview below.
https://t.co/ED63wHBK0H

[Matthew Savill @MTSavill]

This is overthinking it. The reason he said this is because war isn’t necessarily imminent, and we are actually trying to deter and prevent it.

Also, David Williams left as MOD Permanent Secretary over a year ago.

[Steve Scrase @StevenScrase]

The reason the First Sea Lord, General Sir Gwyn Jenkins, delivers contradictory, neutered statements—"I am not telling you that war is coming, but instability is here and our job is to be ready"—is not accidental. It is a choreographed Whitehall script designed to manage political and fiscal risk:

1. The Treasury Gag Rule (The Fiscal Trigger)

If a Service Chief stands up on the flight deck of HMS Prince of Wales and states plainly: "War is coming," it creates an immediate constitutional and fiscal liability for the government.

•Under British strategic doctrine, acknowledging imminent major-power conflict destroys HM Treasury’s peacetime spending limits.

•It would instantly shatter the Chancellor's fiscal envelope, forcing an emergency defence baseline expansion beyond 2.5% or 3% of GDP.

•To prevent this, the Cabinet Office, No 10, and the Treasury mandate hedged, passive language: "instability," "unpredictability," and "hybrid challenges" rather than "imminent state-on-state war."

2. MoD Main Building Vetting (DDC & Perm Sec)

Every keynote address delivered by a four-star commander is submitted to the Directorate of Defence Communications (DDC) and cleared through the civilian apparatus overseen by David Williams CB (MoD Permanent Secretary).

•Williams is the MoD Accounting Officer. His statutory loyalty is to financial compliance and risk mitigation, not war-fighting lethality.

•The civilian comms machine scrubs speeches of anything that creates policy tension with Downing Street. The result is the corporate jargon you see: a senior Royal Marine General speaking like a mid-level management consultant delivering a risk-management disclaimer.

3. The "Patrick Sanders Lesson"

Senior officers know precisely what happens when a commander steps off the reservation. In 2022, General Sir Patrick Sanders (then Chief of the General Staff) told the truth: he warned of a "1937 moment" and called for the mobilization of a citizen army to deter Russia.

•He was frozen out, rebuked by Whitehall civil servants, and replaced.

•CDS Admiral Sir Tony Radakin’s tenure taught the top brass that political survival inside Westminster requires delivering techno-optimist buzzwords ("digital backbone," "integrated deterrence") while remaining silent on the collapse of raw physical mass. General Sir Gwyn Jenkins—appointed First Sea Lord in May 2025—is an exceptional operational soldier, but he is forced to operate within this Whitehall-mandated straitjacket.

4. The Grand Irony:

He is delivering this speech onboard HMS Prince of Wales in Oslo. That £3.5bn carrier is a floating symbol of the mixed-signal crisis: a flagship vessel with an air group reliant on US Marine Corps F-35s because the RAF and Fleet Air Arm lack enough sovereign jets, escorted by a surface fleet so depleted of Type 23s and 45s that the Royal Navy struggles to deploy a sovereign Carrier Strike Group without begging NATO allies for anti-submarine protection.

[Deborah Haynes @haynesdeborah]

⚓️The head of the @RoyalNavy says he is not telling us all that war is coming but he says the world is more unstable than he has seen it at anytime in his 36 year career and “our job is to be ready”.

General Sir Gwyn Jenkins is speaking at the opening of an “international sea power conference” off the coast of Norway hosted by the UK on its flagship aircraft carrier @HMSPWLS

The First Sea Lords says: “We are no predictors of war. I am not telling you that war is coming but I am telling you that instability is here and our job is to be ready.”

[Matthew Savill @MTSavill]

@BrewerEricM Quite. ‘Kicking the can down the road’ is what we have under the Trump administration, but the delaying action has been performed with bombs instead of diplomacy.

[Dr Louise Marie Hurel @LouMarieHSD]

Great seeing Maj Gen Fayes from @DefenceHQ Defence Cyber and Electromagnetic
Force talked about the UK conducting ‘hunt force’ missions. This was a core point that we heard from NATO member states and Allies in our research on cyber deterrence. @RUSI_org https://t.co/N9qqxsvqeY

[Steve Prest ⚔️ 🛠️⚡⚓🍓 @fightingsailor]

This is excellent.

The 'Organisation' component of capability is often undervalued and under-developed, but it can be a real catalyst in driving capability change.

[Matthew Savill @MTSavill]

'Effector strike drone'? Are the people putting this stuff out now just slapping words together?

[Royal Navy @RoyalNavy]

The goal of a Hybrid Navy is another step closer thanks to two milestones on @HMSQNLZ.

A Nyan effector strike drone has been launched from a UK aircraft carrier for the first time.

The ship also landed and launched a Tekever AR5 multi-role drone.

🔗 https://t.co/uma9FOhwZL

[Lucy Fisher @LOS_Fisher]

EXCL: The UK is lagging behind other European countries in public understanding of the threat posed by Russia, the head of the British military has warned in an interview with @FT.

Air Chief Marshal Sir Richard Knighton, chief of the defence staff, said that Britain needed to “catch up with our European allies”, including those geographically closer to Russia who felt the proximity of its aggression and the war in Ukraine more acutely.

He promised further action to counter Moscow’s submarines in the North Atlantic, ahead of a new ‘northern navies’ maritime pact between the UK and nine Northern European allies (Netherlands, Nordics, Baltics and Iceland), expected to be signed on Tuesday.

https://t.co/lapZrYEsHX

[Jerome Starkey @jeromestarkey]

🚨 NEW RECORD - 210 days

A whisker shy of SEVEN MONTHS under the sea

HMS Vengence returns today, Remembrance Sunday.

She set sail on April 12.

[Matthew Savill @MTSavill]

@DavidLarter Welcome. And people can get out of here with their ‘one-way attack’ nonsense.

[Matthew Savill @MTSavill]

I'm very pleased we are running a follow-up to last year's popular conference sustaining a protracted conflict (because war has a life of its own!). There are still some tickets remaining, so take a look at the excellent speakers we have lined up and grab yours today.

[RUSI @RUSI_org]

Long-war preparedness is what makes deterrence credible. Hamish Mundell explains how it links to force sustainability and readiness: https://t.co/Rwk30CXGbZ

That is also the focus of our Long War Conference 2026, which looks at how Britain can prepare for protracted conflict: https://t.co/9kKprGqDPV

[Matthew Savill @MTSavill]

This doesn't rebut @Justin_Br0nk's argument - far from it. Air power remains key to Western thinking about war. But it needs to be working in support of clearly defined and *reasonable* political goals, and usually combined with other forms of military power.

[Matthew Savill @MTSavill]

Good article by my @RUSI_org colleague, with a point (made in part by the article) worth emphasising: even in the cited cases of air power success (Libya and Kosovo) there was a 'ground force' present playing a role or taking advantage of the air superiority.

[Foreign Affairs @ForeignAffairs]

Although the “global aura of U.S. airpower” is declining, the United States should continue to prioritize air superiority, argues @Justin_Br0nk. “Airpower remains the most potent piece of the United States’ conventional forces.”
https://t.co/W90sYlS5do

[Matthew Savill @MTSavill]

In the case of Libya, the ground force taking advantage of the air superiority being provided was the Libyan resistance. Without this, the effect would have been different (probably still the blunting of the advance of government forces towards places like Benghazi).

[Kelly Grieco @ka_grieco]

With the midterms over, attention now turns to whether the US will restart major strikes on Iran, and if so, for how long. The forces in theater could open a campaign on Feb's scale, but the munition stocks likely couldn't sustain it, and US forces would face greater risk. A 🧵.

[Kerry Boyd Anderson @KBAresearch]

If you're a War on the Rocks or RUSI member, check out this upcoming webinar on Nov. 12! https://t.co/iQkUGAFzgF