If you're really pushed for things to do during the 15-minute journey from London Paddington to Heathrow Airport using the Heathrow Express link, then help is now at hand.
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Launching next week, the Wi-Fi service will offer 8Mbit/s connection speeds throughout the journey between London and the airport, including the entire stretch of the 6km tunnel section.
This is the first time that WiMAX technology has been used underground for high-speed communications anywhere in the world. WiMAX provides a single streamed network for internet connection, and works like a mobile network for the web.