Dan Jarvis took over as Defence Secretary on 11 June 2026, stepping into a job already facing serious problems before he'd settled in.

His timing could hardly be worse. Days before his appointment, a serving military leader warned that the UK was running out of time to boost defence spending as plans stall. A day after Jarvis started, a retired military chief went further: Britain's underfunded defence plans are pushing private companies away and driving contractors to work in Europe instead. Two separate military voices — one still in service, one recently retired — saying roughly the same thing within a week.

What Jarvis Is Taking Over

The foundations were laid by his predecessor, John Healey. Over nearly two years, Healey built what he called a complete rebuild of British defence. The Strategic Defence Review 2025, called Making Britain Safer, came out in July 2025. The government promised what it described as the biggest sustained increase in defence spending since the Cold War ended. Healey also created a National Armaments Director in October 2025 — a new post designed to cut through the red tape in weapons and equipment buying. At a speech that same month, he outlined a plan to use defence spending to boost the economy across every part of the UK — worth noting, because defence contracts have historically gone to a small handful of areas in England.

On the international side, the UK and Germany signed the Trinity House Agreement on defence cooperation, with an update in May 2025 after Healey met German officials. Now Jarvis has to keep that relationship going and make it stronger.

The Sticking Point

The real problem is simple but serious: there's a gap between what the government promised in those grand reviews and what actually got funded. A detailed Defence Investment Plan — the document that's supposed to spell out what the armed forces need to buy and how much it will cost — still hadn't been finished by early June 2026. The military leaders quoted in Reuters on 5 June made clear they see the delay as an operational risk, not just paperwork being slow.

The 12 June report adds a business angle: without a proper, fully funded plan, private companies won't invest. Defence contractors can choose to work for better-funded clients in Europe or the United States instead, and many are doing just that. The National Armaments Director was supposed to solve exactly this kind of problem — clearing away the obstacles that slow down defence contracts. Whether the role has had time to make a real difference isn't yet clear.

This isn't unique to Britain. NATO countries across Europe face the same issue — they've committed to higher defence spending in their strategies and speeches, but their governments haven't yet built the machinery to spend that money effectively and quickly. Westminster has actually been faster on the strategy than on the boring but vital business of administration. The review was published, the spending announcement made, the agreements with partners signed. What hasn't kept pace is the day-to-day process of turning those commitments into signed contracts and real military capability.

Jarvis brings particular experience to this job. He's a former Parachute Regiment officer who has deployed on operations, and he's held national security roles in government before. That background matters in Defence — the Secretary of State's authority depends partly on whether the military top brass respect him, and they've already said publicly they're frustrated with the delays.

The immediate task is clear: publish or finish the Defence Investment Plan. Until that document exists, the government's spending promises are just words. The military has made it plain that it won't wait forever for the paperwork to catch up with the politics.