Originally formed in 1989 as a business unit of London Buses Limited, Metroline was privatized in 1994 through a management buyout. Its expansion has been marked by several high-profile acquisitions: Doubled the company's size.

Awarded franchises in Greater Manchester, launching operations as Metroline Manchester in January 2025. Sustainable Fleet & Infrastructure

The Edgware Bus Garage was completely electrified in 2024, operating exclusively zero-emission services.

Whistleblower reports in 2012 raised concerns about vehicle defects, though the company maintains rigorous service standards.

It launched London's first fully electric double-deck routes (43 and 134) in 2019.

Acquired five western London garages, forming "Metroline West".