When the Channel Tunnel was first announced in the 1980s it was part of the proposals to operate high-speed rail services through it on both sides of the English Channel with a substantial network envisioned. This was gradually reduced to a core service, along dedicated TGV-style high-speed lines, between the three capital cities, regional daytime services to Glasgow (via the East Coast Main Line) and Manchester (via the West Coast Main Line), and Nightstar sleeper services to the same cities as well as the West Country and Wales via the Great Western Main Line.