LU requires five 108m-long six-car trains for the Northern Line with an option for up to 45 additional trains, plus an option for up to 18 126m-long seven-car trains for the Jubilee Line. LU is considering whether to cascade trains between the two lines, which may require the incorporation of redundant Jubilee Line trailer cars into the new trains.

The tender includes an option for a through gangway between cars within each train. The trains must be designed for a life of 40 years, and meet high levels of reliability and performance from entry into service.

The contract will have a minimum value of £40m and could reach £470m if all options are exercised. The contact will run for four years and six months.

LU announced on August 21 that it had selected Ferrovial Agroman Laing O'Rourke for a £500m contract to design and construct the extension to the Northern Line from Kennington via Nine Elms to Battersea. The award of the contract is conditional on funding and approval of the project by a public enquiry which is expected shortly. The total cost of the project is around £1bn and it will be financed by contributions from the developer of the old Battersea Power Station site and through a new enterprise zone. The extension is expected to kick start regeneration of the Nine Elms area.

It is hoped to start construction of the extension in spring next year and complete the project in 2020.

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