The new Tube trains' 150-mile journey before they arrive in London

Shiny new Piccadilly line trains, 80 per cent of which will be assembled in Yorkshire, are set to start service in 2025.

The first of these trains will undergo testing in Wegberg-Wildenrath, Germany, while the later stock will head straight to London after being built in the north of England, MyLondon understands.

In December last year, TfL revealed that the manufacture and deployment of the Tube's latest additions were being 'rephased'.

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A report last year to the authority's board highlighted this move, explaining that the revised 'schedule of payments and delivery' allows bosses to 'better align the introduction of the new trains with the refurbishment of our depots'.

Despite the rephasing, officials assured that this won't affect the delivery of the first train in 2024 for testing in London ahead of entering service in 2025, and it will also protect the planned Piccadilly line timetable uplift in 2027.

This means that Londoners can still look forward to the benefits of the new, higher capacity walk-through trains and more frequent services. Furthermore, more new trains will be constructed at the Siemens Mobility factory in Goole, Yorkshire, than the 50 per cent initially planned.

However, the last train is now expected to be delivered 'slightly later than previously expected'.

When asked if the 'rephase' implies a staggered introduction of new trains, a TfL spokesperson confirmed to MyLondon that there will be a slight delay in receiving the final train.

They explained: "The new delivery schedule will mean that the last train will be delivered to TfL in autumn 2027 - slightly later than previously expected but without impacting the planned timetable uplift in 2027 from 24 to 27 trains per hour."

Regarding potential depot refurbishments ahead of the new trains' arrival, TfL clarified that while some infrastructure updates are necessary, the complete overhaul of depots at Cockfosters and Northfields isn't required immediately.

The spokesperson elaborated: "The relationship between maintenance facilities and introducing new trains into service requires the delivery of some aspects of the refurbished facilities first, some at key points during the introduction of the new trains, and other elements once the full fleet is in place to meet requirements for later-life heavy maintenance."

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