Metronet Rail was an asset-management company responsible for the maintenance, renewal and upgrade of the infrastructure, including track, trains, signals, civils work and stations, on several London Underground lines. It was one of two infrastructure companies in a public-private partnership (PPP) with the Underground.
From 2006, Metronet used five Class 66 locomotives from GB Railfreight to help speed up track replacement works
Tube Lines
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Tube Lines Limited, initially known as Infraco JNP, was an asset-management company responsible for the maintenance, renewal and upgrade of the infrastructure, including track, trains, signals, civils work and stations, of three London Underground lines.
