Merseyrail is both a train operating company (TOC) and a commuter rail network, in Merseyside, England. It is a part of Serco-Abellio, and is formed of two electrified lines of the National Rail network known as the Northern Line and the Wirral Line which run underground in central Liverpool. A third line, separate from the electrified network, is known as the City Line, though this is an informal term used by governing body Merseytravel to refer to local services it sponsors on the Liverpool to Manchester Lines and Liverpool to Wigan Line operated by Northern.