DfT’s £2.7bn write-offs and the pivot to maintenance

IN Brief:

• NAO tallies c.£2.7bn written off across cancelled DfT projects since 2023, driven mainly by HS2 Phase 2.

• Draft RIS3 shifts National Highways’ emphasis toward asset condition, renewals, and safety ahead of capacity-adding schemes.

• DfT’s 2024–25 spend hit £41.3bn — £20.4bn capital, £20.9bn resource — underlining the fiscal stakes of getting project controls right.

The Department for Transport has spent two years unpicking old promises. The National Audit Office’s 2024–25 departmental overview puts a number on it: over £2.7bn written off as schemes were cancelled or rescoped — money largely spent on design, early delivery activities, and assets whose value has since been diminished. It is an expensive accelerant to a policy turn already underway.

The breakdown reads like a map of the last Parliament’s transport U-turns. HS2 Phase 2 accounts for the largest single loss at £2,171m, spanning pre-cancellation spend, the formal halt to Phase 2a and 2b West, and the rescoping of Euston. On the roads side, National Highways’ cancellations include £224m on the A303 Amesbury to Berwick Down (the Stonehenge tunnel), £68m on the A1 Morpeth to Ellingham dualling, and £67m each on the A27 Arundel bypass and the A358 Taunton to Southfields — plus £62m linked to ending the all-lane-running smart motorway rollout. Four further schemes added £46m. None of this will come as a surprise to those tracking the rapid retreat from large enhancements, but the totals are now official, and they are not trivial.

Against that backdrop, the NAO sets out the department’s financial posture: total net spend of £41.3bn in 2024–25, split broadly evenly between resource (£20.9bn) and capital (£20.4bn). Rail still dominates capital spend through Network Rail and HS2; roads account for roughly £7bn via National Highways, and local transport funding remains a significant line. The macro message is clear enough — the sums are vast, the headroom is limited, and slippage or rework magnifies quickly in the accounts.

Policy has moved to reduce that exposure. The draft third Road Investment Strategy (RIS3), published in August, formalises a pivot away from major capacity schemes and toward maintaining and renewing what already exists. The document is explicit: RIS3 “will also build on work started in RIS2 to ensure that through a long-term focus on maintenance and renewals, the network remains safe and fit for the future,” echoing consultation feedback that prioritised safety and environmental outcomes over big new corridors. In other words, fewer shiny bypasses, more durable pavement and structures, and a heavier emphasis on asset stewardship.

That turn is one born of pragmatism. The strategic road network is mature, climate stress is rising, and a sizeable maintenance backlog already constrains performance. The cancellation of new smart motorways in 2023 removed one contentious enhancement stream, and, taken together with the scheme-by-scheme withdrawals since, the direction of travel is obvious: deliver reliability gains and safety outcomes by sweating assets, not by building more lanes.

For contractors and consultants, the pipeline complexion changes with it. Expect more steady-state frameworks and renewals programmes, fewer discrete mega-projects with long lead times and political risk. For clients, the NAO’s lessons page writes itself: define outcomes before committing to scope, recognise resets early rather than late, and avoid locking in budgets against incomplete understanding of deliverability — all points the watchdog hammers home alongside the cancellation ledger. If that reads like common sense, it is, but it is also the gap that generated this £2.7bn bill.

The harder part is execution. The NAO notes HS2’s ongoing “reset,” including contract renegotiations to tighten cost control, and flags that DfT is exploring private finance for some majors — a route that shifts risk on paper but still demands rigorous scope and governance from the client side. Meanwhile, RIS3’s maintenance tilt will only deliver if National Highways can translate strategy into condition improvement, measured consistently and monitored by the ORR under a realistic performance specification. Expect the final RIS3 to land by March 2026; until then, the interim year and early RP3 planning will test whether this pivot is more than a rhetorical correction.

As it always will and as it always must, the industry will adapt. Asset-heavy, programme-based work suits contractors with regional plant, structures expertise, and strong supply chain control. It also rewards digital asset management and whole-life costing — areas where the NAO wants to see productivity gains and, frankly, fewer surprises. The cynic’s view is that “back to basics” usually follows a blow-out; the more constructive reading is that the UK is finally aligning investment with the network it actually runs, rather than the network it occasionally imagines.

Either way, the write-offs have already been banked. The value now lies in halting the churn — prioritising reliable delivery, measurable condition improvement, and safe operations over politically convenient announcements. That is a quieter kind of infrastructure policy, but, after £2.7bn of noise, quiet might be exactly what DfT needs.

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