The Defence Investment Plan sets a direction - the Recapitalisation Plan must provide detail

When I spoke earlier this year at DPRTE, a leading annual defence procurement and supply chain event, one message came through from every corner of the industry: give us clarity, and we will invest.

The Defence Investment Plan (DIP) is a great step forward on that journey, giving headline numbers, named programmes and a delivery horizon to last year’s Strategic Defence Review (SDR). But clarity comes in layers, and one layer is still to come. The SDR committed the MOD to an overarching infrastructure Recapitalisation Plan - a holistic, ten-year assessment of defence infrastructure needs, setting out priorities, estimated costs and provisional timelines, differentiated across the segments of the estate. The DIP tells us the scale. The Recapitalisation Plan is what will tell us the sequence.

The size of the opportunity

And the DIP’s scale is remarkable. The headline is £298bn of planned investment over four years, but the story for our industry sits in the estate. The plan commits £22.7bn to defence infrastructure over the next four years and names three decade-long renewal programmes: Project Royal Oak, £26bn for the naval bases, the biggest upgrade in 45 years; Project Castra, £24bn to modernise the Army's barracks after what the plan itself calls decades of conscious underinvestment; and Project Trenchard, £10bn across the RAF estate.

Alongside them sits a £9bn Defence Housing Strategy, 40,000 forces homes upgraded in the first four years and nine in ten family homes over the decade, enabled by the buy-back of 36,000 homes from Annington, with surplus defence land earmarked for up to 100,000 new homes by 2040.

This is mainstream construction: refurbishment of occupied estate, accommodation, training and medical facilities, utilities and housing, dispersed across every region and nation of the UK. It is condition-led, recurring work, programmes not projects - and government has signalled a "buy British by default" approach that will reward genuine, long-term presence in the communities that host defence.

The capacity question

The plan is candid that its figures are indicative, and its biggest single assumption is industrial capacity. Defence will draw on the same workforce, supply chains and specialist skills as the NHS, schools, justice and major infrastructure - all in parallel. We should be honest: delivering everything, everywhere, at once will be a challenge.

Defence also asks things of construction that other sectors do not. Every project requires security clearance as a minimum entry standard, and building a security-aware culture, a vetted supply chain and the right accreditations take years, not months. Timelines are compressing, cash-flow realities for SMEs remain acute, and the competition for skilled people - including the service leavers and veterans who understand these environments best - is intensifying.

Why the detail matters

This is why the Recapitalisation Plan matters so much. No business can responsibly recruit, invest in offsite manufacturing capacity, or build a vetted supply chain against headline totals alone. Industry shapes itself against sequence: what will be procured, where, in what order, and through which routes. The SDR understood this - it asked for the plan precisely so that private-sector expertise and capital could be drawn in "as quickly as possible".

Sharing that ten-year detail with the market, segment by segment, is the single most powerful step government can now take to de-risk industry investment and unlock the capacity the DIP assumes. Until it lands, firms are planning on ‘what might be’.

Rising to the challenge

Industry, though, should not wait passively. Four things matter most. First, treat the pipeline as a programme: standardised designs, offsite manufacture and productised solutions - forces housing is the clearest invitation in the plan. Second, build security readiness now, before bidding, not after. Third, collaborate: alliance-based models on the Defence Estate Optimisation portfolio have already shown how integrated teams de-risk programmes and compress timelines. Fourth, think place - as Barrow demonstrates, defence investment succeeds or fails on the housing, skills and communities that surround the base.

Foundations matter

At Willmott Dixon we have spent years building those foundations: delivering for the Defence Infrastructure Organisation on live military sites, including the final project of the Army Basing Programme at Kendrew Barracks and new facilities at Sandhurst, holding the Ministry of Defence's Gold Employer Recognition Scheme award, investing in security clearances and a vetted supply chain, and operating a regional delivery model that puts local teams and local supply chains alongside garrison communities. We see our role as twofold: helping government deliver on the commitments it has now made and helping the wider industry mobilise around them.

I have spent my career being optimistic about this sector, and the Defence Investment Plan justifies that optimism. It has turned intent into a programme. The Recapitalisation Plan can turn that programme into a pipeline industry can build a decade of capacity against. The direction is set; give us the detail, and we will deliver.