Waterloo International Railway Station was designed by Grimshaw Architects in collaboration with Sir Alexander Gibb & Partners.It cost PS120 million and was completed in time for the scheduled completion of the Channel Tunnel. Construction of the Tunnel was delayed and the station was not open until November 1994.
Waterloo International has five platforms all covered by a 400 m long glass and steel vault of 37 arches forming a prismatic structure. The five vaults are supported by a grid of cylindrical concrete columns that rise up from the car park level, through the circulation levels to the platforms. A structural glass wall separates old Waterloo Station from the new.