Written Question·Department for Transport·UIN 102589

Lower Thames Crossing: Finance

Tabled: 2 January 2026

Answered: 12 January 2026

Question

James McMurdock

Independent — South Basildon and East Thurrock

To ask the Secretary of State for Transport, what proportion of the risk of construction cost overruns for the Lower Thames Crossing would be borne by (a) taxpayers and (b) private investors under the Regulated Asset Base model.

Answer

Simon Lightwood

The Regulated Asset Base (RAB) model, which is the preferred financing option for the Lower Thames Crossing, is designed to reduce taxpayer exposure to funding risks. Regulatory oversight ensures transparency, fair pricing, and performance standards throu...

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