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High Speed 1

The High-Speed 1 Line, formerly known as CTRL, was the first major railway line built in the United Kingdom for over a century.

Colas Rail Ltd designed, supplied and installed the tracks, the overhead electrification and electric and mechanical systems for Section 1 of the Channel Tunnel rail link.

On 30 July 2003, the Eurostar train broke the British speed record, reaching 334.7 km/hour through Kent on Section 1 of the High Speed 1 Line built by Colas Rail Ltd.