Why is UK infrastructure so expensive?

The UK’s infrastructure costs are amongst the highest globally, making ambitious projects—like new nuclear plants, HS2, and airport expansions—extremely expensive. Hinkley and Sizewell nuclear stations together may end up costing more than the original full costs of HS2, and a new Heathrow runway could reach £40 billion. Even basic upgrades, like sewage tanks and reservoirs, are far pricier than elsewhere. While some projects, such as the Elizabeth Line and Thames Tideway, have been delivered efficiently, these are rare exceptions. The main drivers of high costs are higher costs of capital (due to high interest rates and inflation), low labour productivity, and fragmented project delivery. The UK often builds infrastructure as isolated projects rather than as part of coordinated programmes, which prevents investment in supply chains and skills. France’s programme of nuclear power stations building in the 1980s is an example of how things could be done. Unlike countries that use the state’s balance sheet or commit to long-term programmes, the UK’s piecemeal approach keeps costs high, discourages investors, and limits what can actually be delivered. Without smarter regulation and better planning, these high costs will continue to hold back progress.