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How did High Speed 1 improve travel between London and the Channel Tunnel?

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English Channel The Baltic and North seas and the English Channel.

Opened in 2007, the Channel Tunnel Rail Link—also known as High Speed 1—significantly improved travel between London and the Channel Tunnel by facilitating greater movement of international passenger traffic between mainland Europe and the United Kingdom.12

This high-speed railway spans 108 km (67 miles) and includes a route that crosses under the Thames. By allowing trains to reach speeds of up to 300 km (186 miles) per hour, the link provides a faster and more efficient connection for travelers moving through the tunnel.1