UK restarts tank barrel production after 20 years as Rheinmetall opens Telford gun hall

Photo: Ministry of Defence (OGL v1.0), via Wikimedia Commons (illustrative — Challenger 3, the tank these barrels will arm)

Twenty years. That is how long it has been since Britain last forged a big-gun barrel on its own soil — and old arms workers used to say the day the furnaces went cold, something essential went out of the country with them. Well, Thursday changed that. Defence Secretary Wes Streeting stood in a Telford factory and declared that Britain is "back in the business of making the weapons" our Armed Forces need.

Thursday's occasion was the official opening of Rheinmetall's UK Gun Hall in Telford — and according to the government it marks the return of independent large-calibre weapon production to the UK for the first time in two decades. Reuters reported that production has already started: barrels and breeches for 120mm and 155mm weapon systems.

Eight months from empty shed to full production

This bit genuinely astonished me. Rheinmetall took an empty facility and turned it into a working gun factory in just eight months — equipment installed, expertise transferred, production already under way. Breech and breech-block production began in May 2026, and barrel production followed in June.

The Gun Hall occupies 11,500 square metres of production space. At peak capacity it can turn out up to 245 barrels a year across both calibres, plus more than 50 breeches a year, according to the company. The first UK-made breeches, breech blocks and barrels are already rolling off the line.

What they will actually go into

The headline platform is the Challenger 3, Britain's next-generation main battle tank. The 120mm systems support the tank programme, while 155mm guns feed future artillery platforms, including the wheeled RCH 155 howitzers the British Army is buying. Looking further ahead, Rheinmetall says it wants to bring British steel from Sheffield Forgemasters into production, which would deepen domestic supply chains and hand Britain's steel industry a real shot in the arm.

Why Germany is building Britain's guns

The Telford site belongs to Rheinmetall UK, the British arm of the German arms giant — and that is no accident. The Gun Hall sits inside the UK-Germany industrial partnership struck under the Trinity House Agreement. British engineers trained for months at Rheinmetall's plant in Unterlüß, Germany, before bringing the know-how home. Armin Papperger, Rheinmetall's chief executive, called it "a sovereign manufacturing capability that will strengthen Britain's defence industrial base for decades to come."

The money — and the politics

Chancellor John Healey has said he wants the defence industry to help drive Britain's reindustrialisation, and Thursday's announcement is the poster child: 100 highly skilled jobs in what the government calls world-class manufacturing. Rheinmetall already employs around 685 people in Telford, 35 of them at the Gun Hall, and the facility sits within a £200 million-plus investment in UK operations over the past five years.

Streeting's line was the most memorable of the day: "From an empty site to full production in eight months, this is rapid re-industrialisation in action. One hundred skilled jobs in world class manufacturing and the return of large calibre weapon production to UK soil for the first time in 20 years — this is what defence as an engine for growth looks like."

But there is a harder edge, and it is worth stating plainly. The driver is the growing threat from Russia — and behind the ceremony, uncertainty lingers. Reuters noted that some UK defence projects are facing delays amid questions about the timing of the move to 3% of GDP defence spending, a stepping stone toward NATO's 3.5% target for 2035.

What happens next

Production is already running; the real test is whether Telford delivers at pace and at cost — and whether the promised Sheffield steel materialises. If it does, Britain will have closed a 20-year gap in sovereign military capability that nobody seriously thought would be filled this fast. I have watched defence announcements come and go, but an empty factory floor becoming a working gun hall in eight months is a story the UK has not been able to tell for a very long time.

Sources

• Reuters: UK restarts large-calibre weapon manufacturing after 20 years in defence push — 22 Oct 2026: confirms first UK large-calibre production in two decades, 100 skilled jobs, eight months from empty site to full production, and the spending-uncertainty caveat.
• Joint Forces News: Rheinmetall Opens UK Gun Hall in Telford — 22 Oct 2026: full release detail — 11,500 m² facility, up to 245 barrels and 50+ breeches a year at peak, Streeting and Papperger quotes, Sheffield Forgemasters steel plan, Trinity House Agreement.
• PresseBox/Rheinmetall AG: New chapter for British firepower — 22 Oct 2026: confirms the £200m-plus five-year UK investment, 685 Telford employees, Boxer and Challenger 3 programmes.