The Elizabeth line is already fully open and operational. The final phase of the project was completed on May 21, 2023, when the full "end-to-end" service was introduced. This allowed passengers to travel directly from Shenfield in the east to Heathrow or Reading in the west without changing trains at Paddington or Liverpool Street. As of February 2026, the line operates as a high-frequency "turn-up-and-go" service with up to 24 trains per hour through the central core during peak times. The project, originally known as Crossrail, officially shed its construction identity once the final integration of the eastern and western branches was finalized. It now serves as a vital artery for London, connecting major hubs like Canary Wharf, the West End, and Heathrow Airport in significantly reduced travel times compared to traditional Tube lines.