December 2021 - Project near completion; September 2021 - Construction underway; June 2020 - Balfour Beatty has been given the green light to start work on the project; September 2018 - Plans for the upgrade have been submitted for approval, with construction to start in 2020; August 2014 - Balfour Beatty has been awarded GBP75mn (USD126mn) contract for design and build under ECI; Project cost - GBP355mn