Greater Manchester Metro Limited (GMML) was a private company formed by the GMA consortium (GEC Alsthom, John Mowlem and AMEC) in 1989 to design, build and operate the Metrolink light rail system in Greater Manchester, England. Construction of the Metrolink system began in March 1990. In July 2007 the contract to operate Metrolink was awarded to Stagecoach. Unlike Serco, Stagecoach did not own the concession, merely operated it on a fixed-term management contract. Stagecoach later sold the contract to the RATP Group.