The Serco reference article from the English Wikipedia on 24-Apr-2004
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Serco

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Serco is a company with several branches.

The transport branch operates London’s Docklands Light Railway (DLR), Manchester Metrolink, Copenhagen Metro and Great Southern Railway in Australia. Also it has formed a joint venture with NedRailways, the international arm of Dutch national rail operator Nederlandse Spoorwegen; they have been granted a concession for 25 years for Merseyrail Liverpool, UK.