Unlike most LGV stations in France, the through tracks for Ashford International station are off to one side rather than going through, partly because the station pre-dates the line. High Speed 1 approaches Ashford International from the north in a cut-and-cover "box"; the southbound line rises out of this cutting and crosses over the main tracks to enter the station. The main tracks then rise out of the cutting and over a flyover. On leaving Ashford, southbound Eurostars return to the high-speed line by travelling under this flyover and joining from the outside. The international platforms at Ashford are supplied with both overhead 25kVAC and third-rail 750VDC power, avoiding the need to switch power supplies.
