London Overground Rail Operations Limited

From the Wikipedia page

London Overground Rail Operations Ltd, formerly known as MTR Laing Metro Limited, is a train operating company contracted to operate the London Overground train service on the National Rail network, under the franchise control of Transport for London. The company is a 50/50 joint venture between the European transport operator Arriva's division Arriva UK Trains and Hong Kong rail operator MTR Corporation.

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