Yes, free Wi-Fi is available on all Eurostar trains across all routes (London, Paris, Brussels, Amsterdam, and Cologne) in 2026. The connection is facilitated by a combination of 4G and 5G mobile signals along the track. While it is sufficient for emails, messaging, and basic web browsing, it can be "spotty" while the train is inside the Channel Tunnel or moving through remote rural areas at high speeds (186 mph). Passengers in Eurostar Plus or Premier classes often receive a higher-tier "pro" connection with larger data allowances and better speeds for video calls. To connect, you simply join the "Eurostar:Free:WiFi" network and register with your name and email. Note that for security and bandwidth reasons, Eurostar may restrict or "throttle" heavy streaming services like Netflix or large file downloads to ensure a stable connection for all passengers on board.