This document is part of how we hold Network Rail to account.
The annual assessment of Network Rail sets out our views on Network Rail’s performance between 1 April 2022 and 31 March 2023, the fourth year of Control Period 6 (CP6), which runs from 1 April 2019 to 31 March 2024.
It sets out our views on Network Rail's delivery to its wide range of stakeholders within its regions and functions, highlighting any current and forthcoming risks as well as other areas of concern.
The report contains separate chapters on network-wide performance, the performance of Network Rail’s regions, and its System Operator function, including how it has performed for freight and national passenger operators. We compare performance, identifying best practice, and areas for improvement.
Our annual assessment is published once a year in the summer. In the autumn we provide an interim assessment in the form of targeted letters to Network Rail addressing specific issues of concern.