Revealed in the National Infrastructure and Services Transformation Authority’s (Nista’s) annual report 2024/25, the DfT spent £175.3M on CS2 and CS3 over
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Where CS1 (Oxford to Milton Keynes) is concerned, the project spend 5.9% more than expected over the last financial year, spending £125M against a forecast of £118M according to the Nista annual report.
Nista stated this was driven by risk funding that has been brought forward to cover the cost of some minor snagging issues.
The completion date for CS1 is still scheduled for next month but Nista’s report detailed how there are concerns regarding entry into service. This has been delayed due to the signing of the Deed of Amendment not yet being done and a decision on mode of operation, which in turn has delayed driver training.
The report continued: “Overall the schedule remains ambitious but achievable. Progress is being made with stakeholders to ensure operational readiness for entry into service by 2025.
“The project remains broadly on budget and to schedule. The Deed of Amendment with Chiltern Railways has been signed, which officially onboards them as the Train Operating Company for CS1 services.
“Risk still remains over the trade union response to the mode of operation decision and how this may affect proposed time schedules to enter into service.
“Operational readiness planning remains a key priority focus for the project to deliver services by the end of 2025. “