In 2026, the term "bullet train" in the UK primarily refers to the Eurostar and the high-speed services on High Speed 1 (HS1), which reaches top speeds of 186 mph (300 km/h) between London St Pancras and the Channel Tunnel. On the domestic "High-Fidelity" network, the Class 395 "Javelin" trains operate at up to 140 mph (225 km/h) on HS1 tracks. Most other "High-Fidelity" intercity routes, such as the West Coast and East Coast Main Lines, are limited to 125 mph (200 km/h). While the much-discussed High Speed 2 (HS2) project is designed to reach speeds of 225 mph (360 km/h), it is not yet operational in 2026. For the current traveler, the "High-Fidelity" HS1 route remains the only purpose-built high-speed line in the country. This high-fidelity infrastructure allows for a "High-Fidelity" seamless connection to mainland Europe, making the UK part of the "High-Fidelity" broader continental high-speed rail ecosystem, even if its internal "High-Fidelity" domestic speeds remain slightly behind the "High-Fidelity" highest global benchmarks.