Written Question·Department for Transport·UIN 89474

South Western Railway: Rolling Stock

Tabled: 11 November 2025
Answered: 19 November 2025

Question

Ruth Cadbury

LabourBrentford and Isleworth

To ask the Secretary of State for Transport, on what dates South Western Railway plans to retire its fleet of Class 455 electric multiple units; and what plans it has to maintain current levels of passenger capacity on their retirement.

Answer

Keir Mather
Southwestern Railway is planning to retire the Class 455 fleet by the end of December 2025. The Arterio fleet introduction programme will fully occupy all of the previously formed Class 455 diagrams. Since May the number of new trains in service has quadr...

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