This project will provide infrastructure capability enhancements to enable the operation of new longer electric trains.

Under present plans up to 43 platforms need to be extended to cope with class 365 and 387 EMUs operating up to 12-car in length over core and diversionary route sections.

Core routes include Paddington to Oxford, Slough to Windsor and Eton Central, Twyford to Henley, Reading to Newbury and Reading to Basingstoke.

Work is expected to be completed in phases up to June 2017