The Private Finance Initiative (PFI) is a public private partnership model that was introduced in 1992, and was then succeeded by ‘PF2’ in 2012. See Practice Notes: Introduction to PFI and PF2, Key parties in a PFI/PF2 project and PFI structure—diagram. This Practice Note looks primarily at disputes on PFI projects (as opposed to those in relation to PF2), given that there are significantly more PFI projects. In 2018, it was announced that the government would no longer use the PF2 model on new projects. However, existing PFI and PF2 projects will continue to run. As a result of the typical lifespan of such projects (25–30 years), existing projects, and disputes that arise on them, will likely continue for some years to come. The contractual context of PFI disputes It is not uncommon for disputes to arise on PFI projects—the contracts that govern such projects are extensive and the projects themselves are high-value and complex, and involve a number of interested parties. PFI projects broadly consist of three phases—procurement, construction and operation/maintenance (O&M). Disputes may arise in any of these