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Transport for London is moving Tube maintenance in-house in a bid to save £80 million in management fees over the next decade, it announced today.

The Jubilee, Northern and Piccadilly lines will be looked after by TfL’s own engineers after it is released from a contract with private firm Amey next year.

The move is part of a drive by Sadiq Khan to cut waste and improve efficiency within TfL to pay for his fares freeze promise over the next four years.

The mayor said he was “proud” that TfL would be bringing the work back into the public sector as soon as the contract, a legacy of the public-private partnership, allowed.

London Underground already has experience of managing operations in-house following the collapse of maintenance firm Metronet in 2007.

The body will not make a profit from the deal, with all savings put back into modernising the transport network and freezing TfL fares.

TfL claims the Mayor’s fares freeze pledge will cost £640 million and be funded by major cost-cutting, including organisational restructuring.

It will also see cuts to agency staff and a recruitment freeze, as well as a senior staff pay freeze and end to some free travel perks for families.

This would deliver the cash for the first two years, with TfL working on the remaining two, against a backdrop of it losing its central government grant in 2018.

Mark Wild, managing director of LU, said: “We are carrying out a root-and-branch review of our business to cost less and make transport in London more affordable for our customers.

“As part of this, we are using our in-house maintenance expertise to save tens of millions of pounds.

“There will be no impact on our extremely high standards of maintenance and we will be working closely with Amey over the next 18 months to ensure a smooth transition.”