Rolling stock › In serviceData updated
B23 Stock
CAF's Inneo trains for the DLR: five cars you can walk through, with 12 sets of doors a side, replacing the oldest trains.
Scale
284 ft (86.7 m) over couplers
B23 Stock · schematic drawing GB Trains · gbtrains.uk/stock/b23/ · CC BY 4.0
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- Type
- Light rail vehicle, five cars walk-through
- Builder
- CAF, Beasain (Spain)
- In service
- since 2025
- Lines
- DLR
- Formation
- 5 cars, walk-through (three motor cars and two trailers), 284 ft (86.7 m)
- Trains in fleet
- 54 ordered
- Top speed
- 50 mph (80 km/h)
- Power
- 750 V DC third rail · how it works
- Bogies
- Inside-framed motor bogies, two motors each (B23); inside-framed trailer bogies under cars B and D
- Train length
- 284 ft (86.70 m)
- Car height
- 11 ft 6 in (3.512 m), to the top of the air-conditioning units; the roof line is 11 ft 4 in (3.461 m)
- Car width
- 8 ft 8 in (2.65 m)
- Profile
- light rail
- Walk-through
- Yes
- Air-conditioned
- Yes
- Total capacity
- 792 passengers (every seat and 5 standing per square metre), with 3 wheelchair spaces
- Status
- Being introduced: the first entered service in autumn 2025, the three in service were withdrawn in November 2025, and the first returned on 7 September 2026. TfL is finalising the rest of the rollout with CAF.
Car types
| Code | Car | Length | Doors per side |
|---|---|---|---|
| A | Driving motor (cars A and E), with a cab | 54 ft 5 in16.58 m | 2 double |
| B | Trailer (cars B and D) | 51 ft 1 in15.58 m | 3 double |
| C | Motor (car C) | 51 ft 1 in15.58 m | 2 double |
Sources
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Show the 25 sources from Transport for London, Wikimedia Commons, Rail Engineer and 5 more
- 'B23-209-Stratford-Pltfm17-FullTrain.png' (photograph: B23 209's cab car; CC0) Wikimedia Commons (citytransportinfo), 2 October 2025the glazing band from the cab to the first door (2025)
- 'Docklands Light Railway type B23 at Corella, Spain 03.jpg' (photograph: a B23 car side-on; CC BY-SA 2.0) Wikimedia Commons (tompagenet), 28 July 2022the saloon glazing as one flush band with thin joints (2022)
- Technical drawings for DLR stock trains (FOI-4241-2324): B23 train general layout (CAF C.M0.00.001 Ed. D), B92 general vehicle layout (DL-999-0001-1), B2007 vehicle layout (2021) Transport for London, 28 February 2024, pp. B23 sheets 1–2dimensions, bogies, doors; side elevation
- Environmental Product Declaration S-P-11359: Inneo B23 for DLR CAF, 14 December 2023, pp. 1, 4, 5built at Beasain; length, width, capacity, speed, power (750 V DC, p. 4); the capacity's basis, every seat and 5 standing per square metre (p. 5)
- New trains on the Docklands Light Railway Rail Engineer, 19 December 2023doors, formation; two motors in each of the motor cars' bogies
- Contract awarded to replace oldest DLR trains Transport for London (press release), 12 June 2019order
- Order placed for additional 11 new state-of-the-art DLR trains Transport for London (press release), 30 June 202311 more, making 54
- New state-of-the-art DLR trains begin to roll into service Transport for London, 1 October 2025first in service
- New DLR trains returning to customer service by late summer Transport for London, 27 February 2026withdrawal
- First new state-of-the-art DLR train returns to customer service following completion of enhancements and testing programme Transport for London, 7 September 2026return to service
- TfL details rollout plan for new DLR trains after first enters service Rail, 7 October 2025rollout plan
- 'Docklands Light Railway type B23 at Corella, Spain 07.jpg' (photograph: a B23's cab front on test; CC BY-SA 2.0) Wikimedia Commons (tompagenet), 28 July 2022the cab-end coupler's parts and tones (layout only)
- New state-of-the-art DLR trains begin to roll into service Transport for London, 1 October 2025air-conditioning for improved comfort, and walk-through carriages, listed as features of the new trains
- Contract awarded to replace oldest DLR trains Transport for London (press release), 12 June 2019air conditioning and walk-through carriages named as features of the new trains
- New trains on the Docklands Light Railway Rail Engineer, 19 December 2023open gangways between the five cars
- Technical drawings for DLR stock trains (FOI-4241-2324): B23 train general layout (CAF C.M0.00.001 Ed. D), B92 general vehicle layout (DL-999-0001-1), B2007 vehicle layout (2021) Transport for London, 28 February 2024layout of the underframe equipment (view 1: every car's cases, tanks and grilles, positions and depths)
- Docklands Light Railway B23 Stock 02.jpg (photograph, CC BY-SA 2.0) Tom Page, via Wikimedia Commons (Flickr), 2 July 2023layout of the underframe equipment (view 1's side: the cases' tones, a cross-wise tank, a dark grille; layout only)
- DLR B23 Unit 209 at Stratford in October 2025 06.jpg (photograph, CC BY-SA 4.0) Sunil060902, via Wikimedia Commons, 2 October 2025layout of the underframe equipment (the other side's lengthwise tank and cases; presence and tone only)
- New trains on the Docklands Light Railway Rail Engineer, 19 December 2023collector shoes on all three motor cars (the third rail)
- First new DLR train makes long-awaited passenger debut Rail, 1 October 2025209 carried passengers for the first time on 29 September 2025
- In Pictures: DLR fleet changes - more B23s into service as further old units go for scrap British Trams Online, 1 November 2025209 entered service on 30 September 2025
- 'Dlr b23 eve-1.jpg' (photograph: B23 209 departing Canning Town for Woolwich Arsenal, long lens, three-quarter from ahead and above; CC BY-SA 4.0) Wikimedia Commons (Tyxcho), 30 September 2025the livery (set T7): the white nose cap with teal from its joint, the white panels at the gangway ends, the black foot band, the yellow door nosings, the grey gangway bellows (sampled against the white body); measured in the bodyside plane
- 'New DLR stock 02.jpg' (photograph: unit 231's cab car at a platform; CC BY 4.0) Wikimedia Commons (HJ Mitchell), 11 September 2026the nose cap as a separate white moulding with a dark joint (presence only)
- 'Docklands Light Railway type B23 at Corella, Spain 03.jpg' (photograph: a B23 car side-on; CC BY-SA 2.0) Wikimedia Commons (tompagenet), 28 July 2022window corners (set T7): the glazing band about 25 mm, the door glass about 15 mm; the white gangway-end panel and the foot band on car A's rear (2022)
- 'B23-209-Stratford-Pltfm17-FullTrain.png' (photograph: B23 209's cab car; CC0) Wikimedia Commons (citytransportinfo), 2 October 2025the gangway bellows' tone (set T7): grey, 0.77 of the white body's brightness in the same shade
unverified
- First passenger day: 30 September 2025 (British Trams Online; the photographer's caption on 209 at Stratford) or 29 September (Rail); TfL announced it on 1 October
- Door width: the clear opening isn't printed on the general layout
- The bogies: laid out from CAF's sheet; the long unit high in the middle and the motor bogies' box aren't identified, and the collector shoes the motor cars carry (Rail Engineer) aren't drawn, as the sheet doesn't mark them
- The underframe: the cases' tones from two photographs (pale grey cases, dark grilles); the dark mass behind them to 1 ft 4 in (400 mm) is estimated (the sheet draws daylight between the cases, the photographs a dark shadow)
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