Greater Anglia (legal name Abellio East Anglia Limited) is a train operating company in Great Britain owned as a joint venture by Abellio, the international arm of the state-owned Dutch national rail operator Nederlandse Spoorwegen, and the Japanese trading company Mitsui & Co. It operates the East Anglia franchise, providing the commuter and intercity services from its Central London terminus at London Liverpool Street to Essex, Suffolk, Norfolk and parts of Hertfordshire and Cambridgeshire as well as many regional services throughout the East of England.

Abellio began operating the franchise, then known as the Greater Anglia franchise, in February 2012. Initially, it traded under the same name until it rebranded as Abellio Greater Anglia in December 2013. Shortly after taking over operations, the company initiated a series of projects to improve service levels, including the procurement of new trains and the launch of the ‘Norwich in 90’ programme to reduce travel times between several major locations on its network. In May 2015, Greater Anglia’s stopping metro services were transferred to London Overground and the precursor to Crossrail, TfL Rail.

The franchise was re-tendered as the East Anglia franchise, and awarded to Abellio in August 2016. The company resumed trading as Greater Anglia on 16 October 2016 when the new franchise commenced. In January 2017, Abellio announced that subject to gaining Department for Transport approval, it had agreed to sell a 40% stake in the business to Mitsui. Since the completion of the sale in March 2017, Greater Anglia has incorporated several Japanese planning tools and practices.