London Underground says that moving control-room services to Hammersmith will increase capacity on the tube network.
A single control centre is being set up as part of a major modernisation programme. New signalling systems are also being installed on the Metropolitan, District, Hammersmith & City and Circle Lines.
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The action comes as a commuters' group goes to court to seek a judicial review of the franchise.
Michael Bond, the creator of Paddington Bear has died at the age of 91.
Rumours on social media prompted the IPCC to take the highly unusual step of releasing details of the preliminary post-mortem examination.