HS2 costs too much money to be justified

The argument

This argument holds that works on HS2 should stop immediately because the project simply costs too much money to be justified: its price has spiralled so far beyond its benefits that no responsible accounting can defend continuing. The cost trajectory is the heart of the case. HS2 was sold on a budget that has been revised upward again and again, with successive official and independent estimates pushing the projected total to figures vastly exceeding the original — tens of billions of pounds, climbing toward and past the hundred-billion mark in some assessments. As costs ballooned, the case on the other side of the ledger weakened: portions of the network were delayed or cut, eroding the connectivity that was supposed to justify the spend, while the headline benefit — shaving time off a limited set of intercity journeys — looked ever thinner against the mounting bill. The benefit-to-cost ratios that underpinned approval deteriorated accordingly. The argument insists this is decisive because the money is finite and rival. Every billion poured into HS2 is a billion not spent on the things that money could otherwise buy — hospitals, schools, local transport that serves far more people, or the broader upgrading of the existing rail network — and at the sums now involved, the opportunity cost is staggering. Continuing to fund a project whose costs have lost touch with its benefits, simply because so much has already been spent, is the textbook sunk-cost error: throwing good money after bad. The rational moment to stop is as soon as the imbalance is clear. From this standpoint, fiscal responsibility requires halting a project the numbers no longer support. Because HS2 costs too much money to be justified, this argument holds, works should stop immediately.

Premises

Counter-arguments

Rising estimates are a reason to control costs and re-scope, not by themselves a reason to stop. The comparison the argument needs is between the remaining cost of completing the line and the cost of cancelling it, and the latter is not zero: contracts must be settled, tunnels and viaducts already under construction must be made safe or filled in, purchased land must be disposed of, and the capacity constraint the project was meant to relieve remains — so the alternative is not an absence of spending but spending on upgrades to lines that are in use, which the West Coast modernisation showed can be extremely expensive and disruptive precisely because the work must be done around live services. Defenders also dispute the benefit description. The case was made principally on capacity released on existing routes for commuter, regional and freight services rather than on journey-time savings, so measuring the project by minutes saved understates it by construction. The sunk-cost charge cuts the other way too: abandoning a partly built asset converts prior spending into a loss rather than avoiding it. And the argument's own observation that cut and delayed sections eroded the benefits describes the consequence of descoping decisions — the eastern leg was cancelled in 2021 and the Birmingham-to-Manchester leg in 2023 — so the deteriorating benefit-cost ratio it cites is partly a product of the policy it recommends rather than an independent case for it.

Rejecting the premises

[Rejecting P1] Rising estimates are a reason to control costs and re-scope rather than to stop: the relevant comparison is between the remaining cost of completion and the cost of cancellation, which includes settling contracts, making part-built structures safe, and still having to add capacity another way. [Rejecting P2] Defenders reply that the benefit claimed was principally released capacity on existing lines for commuter and freight services rather than journey-time savings, and that the descoping which eroded the benefits was itself a cancellation decision rather than an independent fact about the project. [Rejecting P3] Abandoning a partly built asset converts prior spending into a loss rather than avoiding sunk cost, and the alternative uses named are not costless, since upgrading lines that remain in service has proved expensive and disruptive.