Question to the Department for Transport:
To ask the Secretary of State for Transport, what the benefit-cost ratio for Great Western Main Line electrification was on the most recent date for which figures are available.
The most recent estimate of the benefit-cost ratio for Great Western Electrification, dating from February 2015, was 2.36.
The benefit-cost ratio reflects the costs and benefits of electrifying the Great Western network and introducing new electric and bi-mode IEP trains on long distance services and electric multiple units on suburban services.