London Waterloo is Britain’s busiest railway station. The number of passenger journeys has more than doubled in the last 20 years to 234 million per year, and further growth of 40% by 2043 is forecast.
The planned works are expected to provide a 30% increase in peak time capacity by 2019.
A Skanska-led consortium including Colas Rail, Aecom and Mott MacDonald was selected for the project last year. They begin work on site this month.
The former Waterloo International Terminal will be rebuilt, allowing platforms 20-24 to be brought back into use with modern facilities, new track and signalling and a layout suitable for domestic passengers.
Platforms 1 to 4 will be extended to allow longer 10-car trains to run to London suburban stations. This work will take place during August 2017.
A new station concourse near platforms 20-24 will also be built to make more space.
Waterloo International was designed by architect Nick Grimshaw and built by Bovis for £120m but had a short life. It opened in 1994 as the London terminus for Eurostar international train services. It was closed in 2007, after just 13 years of service, when the High Speed 1 Channel tunnel rail link opened and St Pancras and Stratford become the London stations for Eurostar.