reopened later in 1983, with the new name of King's Cross Midland City. Trains ran between Bedford and Moorgate, via St Pancras and the tunnels from the Midland mainline to the City Widened Lines. In 1988 Network SouthEast, one of the newly created sectors of the state-owned British Rail, implemented a scheme first proposed in the 1960s to reopen the Snow Hill tunnel to passenger traffic. The project, and the new north–south connection created, was called Thameslink. Trains ran between Bedford and Brighton using Class 319 dual-voltage trains which could run on both the Midland Mainline's overhead AC system and the Brighton Mainline's third-rail system. Five years after its previous rename, the station at King's Cross was once again renamed, this time to King's Cross Thameslink. Services on the line grew and new stations were added, including a station at the southern end of the Snow Hill tunnel named City Thameslink, which replaced the earlier terminal Holborn Viaduct station which was not on the through route. At around the time Thameslink was launched, British Rail began active planning for the Channel Tunnel Rail Link, a new high-speed line to link London with the Channel tunnel. The initial proposal was for the line to end at a new "King's Cross Low Level" station, which would run from north west to south east underneath the Great Northern Hotel and the mainline terminal, and would become a joint station for Eurostar and Thameslink services. This plan was developed in some detail by architect Norman Foster, but was ultimately vetoed by the government in 1990 due to high costs. The project, which became known as High Speed 1, was eventually completed in 2007 with terminal platforms at St Pancras rather than King's Cross. Closure and relocation In the mid-2000s, Network Rail began work on the Thameslink Programme, a scheme originally proposed in around 1990 but delayed several times. The plan involved increasing the service frequency between King's Cross and Blackfriars up to 24 trains per hour. Planners for the programme decided that the existing King's Cross Thameslink station would be unable to cope with this increase. They criticised its substandard platform widths and lengths, lack of step-free access and fire escape routes, as well as the poor-quality passenger environment. They decided to move the station rather than upgrade it at its existing location. The surrounding infrastructure made this impractical and it would also have