[1] Road access to the site is off Armada Way, south of the Gallions Reach Shopping Park.

The first phase provides space for additional trains, as well as modify the existing maintenance building to allow for easier servicing of the new rolling stock.

[7] Buckingham Group was awarded the £35m contract for the first phase in 2021, commissioned to construct a new carriage wash, extension and modification to existing track, and new sidings for the new trains.

The work was scheduled for completion in September 2023, but Buckingham went into administration the previous month (August 2023).

TfL appointed Morgan Sindall to complete the work, alongside their £90m deal for the second phase, to build a new train shed and deliver further sidings.