3.6 Although the Channel Tunnel Usage Contract obliges the Government to provide sufficient infrastructure to meet forecast demand for use of the Tunnel, there is no obligation to build a high-speed link. The obligations require journey times between London and Paris to be between 2 hours 55 minutes and 3 hours 5 minutes. Current Eurostar UK performance meets these obligations with the existing rail network. Furthermore, track and signalling improvements undertaken since the opening of the Channel Tunnel have allowed direct services to be quicker than the requirements. According to passenger forecasts carried out for the Government's value for money assessment, the existing network and the capacity of the Waterloo International terminal, with minor upgrades, should be sufficient to meet international demand until around 2025. However, there would be a need for extra capacity on the network if the expected increase in demand for domestic services was to be met.