Management
Before the transfer, management of the Tube had been restructured, with the introduction of a Public Private Partnership (PPP) arrangement by the Government.
Under the PPP, LU is responsible for operations, running the trains, stations, control centres, ensuring the Tube is safe and secure, and collecting and protecting fares revenue.
At the same time, private infrastructure companies, or infracos, are principally responsible for the maintenance and renewal of the Tube's infrastructure.
Transport for London

