Question to the Department for Transport:

To ask the Secretary of State for Transport, pursuant to the Answer of 30 March 2026 to Question 121180 on Network Rail: Assets, what assessment she has made of the potential impact of the decline in the Composite Sustainability Index for rail assets on long-term network resilience; and what steps her Department is taking to address the deterioration in underlying rail infrastructure condition.

The Government is clear that Network Rail must ensure that network resilience is either maintained or improved during the current Control Period to an extent that is reasonable.

Network Rail assesses the resilience of the railway network on a continuing basis, under the oversight of the independent regulator, the Office of Rail and Road and has had a Weather Resilience and Climate Change Adaptation strategy in place since 2017.

Objectives for Great British Railways (GBR) in the next Funding Period regarding the condition of railway infrastructure will be a key element of Government’s considerations during the coming Funding Period Review. The impact of rail infrastructure condition on its resilience will be a part of this work. The condition of the network as assessed via the composite sustainability index metric does not necessarily correlate directly with levels of resilience.