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Class 710 Aventra
Bombardier's Aventra for London Overground: 30 AC-only four-car trains, 18 dual-voltage four-car trains and six dual-voltage five-car trains. Ordered from Bombardier in 2015 as 45 four-car trains; in 2017 TfL added nine more, six of them five-car. Due in 2018, they were delayed: the first ran between Gospel Oak and Barking in May 2019, on the routes from Liverpool Street from March 2020, and the last in November 2020, replacing the Class 315s.
Shown
Scale
about 281 ft (86 m) over couplers (added up as drawn)
Class 710 Aventra · schematic drawing GB Trains · gbtrains.uk/stock/710/ · CC BY 4.0
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- Type
- Electric multiple unit
- Builder
- Bombardier Transportation (now Alstom), Derby
- Family
- Aventra, with Class 345, Class 720 Aventra, Class 701 Arterio, Class 730 Aventra
- Built
- 2017–2020
- In service
- since 2019
- Lines
- Weaver, Suffragette, Liberty, Lioness, Mildmay
- Formation
- 4 cars (DMS-PMS(W)-MS-DMS), or 5 cars on the 710/3 (DMS-MS-PMS(W)-MS-DMS), walk-through
- Trains in fleet
- 54
- Top speed
- 75 mph (121 km/h), the approved limit for the 710/2
- Power
- 25 kV AC overhead (710/1); also 750 V DC third rail (710/2, 710/3) · how it works
- Bogies
- Bombardier FLEXX Eco bogies · drawn with the same bogie component as Class 345, Class 701 Arterio, Class 720 Aventra, Class 730 Aventra
- Train length
- 272 ft (82.87 m) (the cars’ lengths added); about 281 ft (86 m) (added up as drawn)
- Coupled
- 2 × 4 cars, about 561 ft (171 m) (the units’ lengths added)
- Car height
- 12 ft 4 in (3.76 m)
- Car width
- 9 ft 1 in (2.772 m)
- Train weight (tare)
- 144 t a four-car AC unit, 151 t a four-car dual-voltage unit, 182 t a five-car (dual-voltage); the driving cars 39 t on the AC units, 42 t on the dual-voltage 710/2 and 710/3
- Profile
- main-line
- Walk-through
- Yes
- Air-conditioned
- Yes
- Seats per train
- 189
- Total capacity
- 4-car: 189 seats and 489 standing; 5-car: 241 seats and 614 standing
- Status
- In service with London Overground, run for TfL by First Rail London since 3 May 2026 (Arriva Rail London before); owned by London Rail Leasing, a joint venture managed by Angel Trains.
Car types
| Code | Car | Length | Weight (tare) | Doors per side |
|---|---|---|---|---|
| DMS | Driving motor | 70 ft 4 in21.446 m | 39 t | 2 double |
| PMS(W) | Pantograph motor (wheelchair spaces) | 65 ft 7 in19.99 m | 36 t | 2 double |
| MS | Motor | 65 ft 7 in19.99 m | 31 t | 2 double |
Sources
How we source figures → · Spotted a mistake? Tell us → (opens in a new tab)
Show the 52 sources from Wikimedia Commons, Transport for London, Hugh Llewelyn, Flickr and 11 more
- 710273 Barking Riverside A.jpg (photograph, kitmasterbloke, CC BY 2.0) Wikimedia Commons, 16 December 2022the door-leaf windows' round ends
- 710273 Barking Riverside A.jpg (photograph, kitmasterbloke, CC BY 2.0) Wikimedia Commons, 16 December 2022the saloon windows' height, frame and corners (side on)
- Barking Riverside station, 710258 at platform 2, July 2022 87.jpg (photograph, TheFrog001, CC0) Wikimedia Commons, 21 July 2022the saloon windows' height, frame tone and corners
- Blackhorse Road Overground station 2019 1.jpg (photograph, Smiley.toerist, CC BY-SA 4.0) Wikimedia Commons, 14 October 2019the saloon windows' height and frames
- Class 710 stock information sheet (released under FOI-0117-2425) Transport for London, p. 2the saloon windows' height (about 6 ft 10 in to 9 ft 10 in (2,080-3,005 mm))
- Class 710 stock information sheet (released under FOI-0117-2425) Transport for London, p. 2the white car-end panels: the band stopping 2 ft 0 in to 2 ft 1 in (620-640 mm) from the ends (measured)
- Blackhorse Road Overground station 2019 1.jpg (photograph, Smiley.toerist, CC BY-SA 4.0) Wikimedia Commons, 14 October 2019the white car-end panel, about 2 ft 2 in (650 mm; projective fit)
- Barking Riverside station, 710258 at platform 2, July 2022 88.jpg (photograph, TheFrog001, CC0) Wikimedia Commons, 21 July 2022the white car ends with the orange lines across them (layout only)
- 710273 Barking Riverside A.jpg (photograph, kitmasterbloke, CC BY 2.0) Wikimedia Commons, 16 December 2022the orange lines along the cantrail and above the blue, their heights (side on)
- Barking Riverside station, 710258 at platform 2, July 2022 87.jpg (photograph, TheFrog001, CC0) Wikimedia Commons, 21 July 2022the orange lines' heights (close, per column)
- Blackhorse Road Overground station 2019 1.jpg (photograph, Smiley.toerist, CC BY-SA 4.0) Wikimedia Commons, 14 October 2019the lower orange line's height
- Class 710 stock information sheet (released under FOI-0117-2425) Transport for Londonbuilder, dates, fleet, dimensions, weights, doors, capacity; the dual-voltage driving cars' 42 t, the unit weights (144, 151 and 182 t) and the five-car formation DMS2-MS2-PMS(W)-MS1-DMS1 (p. 1)
- Procurement of new rolling stock for London Overground TfL Finance and Policy Committee, 17 June 2015order
- Additional rolling stock TfL Programmes and Investment Committee, 13 October 2017the 45 trains of the base order; nine additional units (six five-car, three four-car), the six five-car units to run the North London and West London lines (the Mildmay line), releasing six Class 378s (section 4, option (c))
- New London Overground electric trains enter service Transport for London (press release), 22 May 2019first in service, May 2019
- First course of action: changes in the capital Rail, 28 January 2026subclasses; built at Derby between 2017 and 2020; owned by London Rail Leasing, a joint venture of Lombard North Central and Mithras Rail Holdings managed by Angel Trains
- Bombardier Class 710/1s finally make their passenger debut at Liverpool Street Rail, 4 March 2020710/2s on Watford DC services
- FLEXX appeal: Bombardier's bogie family explained Rail Engineer, 10 October 2013the bogies: the FLEXX Eco (TfL's information sheet) is the B5000 family, inside-framed
- Class 345 Stock information sheet, 1st edition (file "Class 345 Data Sheet ver 3", released under FOI-0416-2223) Transport for Londonthe bogie drawing's layout: the Class 345's bogies as its data sheet renders them (pp. 2-4)
- 720540 MSO (photograph, CC BY-SA 4.0) Wikimedia Commons (Peter Skuce), 18 September 2021the bogie drawing's layout: an Aventra bogie nearly side on (layout only)
- 730 235, Stafford (photograph, CC BY 4.0) Wikimedia Commons (kitmasterbloke), 8 October 2025the bogie drawing's layout: Aventra bogies at an angle (layout only)
- Class 710 stock information sheet (released under FOI-0117-2425) Transport for London, p. 2the drawing's pantograph: car (PMS(W)), its end, hinge, arm length and which way it folds (measured off the part-raised unit diagram)
- New train livery: Bombardier Aventra five-car side elevations and cab fronts Greater Anglia (artwork by Bombardier Transportation), 24 February 2017the drawing's gaps between cars: 2 ft 4 in (716 mm), the Class 720's (a sister Aventra), measured
- 710378, Richmond, June 26th 2025.jpg (photograph, CC BY-SA 4.0) Wikimedia Commons (Southsea_Matt), 26 June 2025the joins between cars: the rounded car ends and the dark gangway between them (layout only)
- 710116 & 710111, Turkey Street, August 8th 2022 - 54995446006.jpg and 710114 & 710108, Hackney Downs, August 8th 2022 - 54995706319.jpg (photographs, CC BY-SA 4.0) Wikimedia Commons (Southsea_Matt), 8 August 2022the cab-front Dellner coupler: the mechanical head, its cone, the box on top and the electric head below (layout only)
- Class 710 stock information sheet (released under FOI-0117-2425) Transport for London, p. 2layout of the underframe equipment (the cases' outlines)
- 710 256 (photograph, CC BY-SA 2.0) Hugh Llewelyn, Flickr, 26 April 2022layout of the underframe equipment (tones of the DMS's and PMS(W)'s cases; layout only)
- 710374 at Kensal Green 14 12 25 (55000138679).jpg (photograph, CC BY-SA 4.0) Foulger Rail Photos, via Wikimedia Commons, 14 December 2025layout of the underframe equipment (the DMS's cases and tones; layout only)
- British Rail Class 345 (infobox: wheel diameter 825-750 mm new-worn, wheelbase 2.25 m, citing Bombardier Transportation, 'Business Unit Bogies - Product Portfolio Presentation', January 2018) Wikipedia, read 11 October 2026the drawing's wheels: 2 ft 8 in (825 mm) new (Bombardier's figure, as Wikipedia gives it)
- 710 256 (photograph, CC BY-SA 2.0) Hugh Llewelyn, Flickr, 26 April 2022the cab end: the Class 720's cab side window, cab door and joints on a 710 (close, front three-quarter; layout only; set AV)
- 710116 & 710111, Turkey Street, August 8th 2022 - 54995446006.jpg and 710114 & 710108, Hackney Downs, August 8th 2022 - 54995706319.jpg (photographs, CC BY-SA 4.0) Wikimedia Commons (Southsea_Matt), 8 August 2022the cab end: the Class 720's cab side window, cab door and joints on a 710 (close, front three-quarter; layout only; set AV)
- 710374 at Kensal Green 14 12 25 (55000138679).jpg (photograph, CC BY-SA 4.0) Foulger Rail Photos, via Wikimedia Commons, 14 December 2025the cab end: the Class 720's cab side window, cab door and joints on a 710 (front three-quarter; layout only; set AV)
- 710376 at London Euston 14 12 25 (54991522922).jpg (photograph, Foulger Rail Photos, CC BY-SA 4.0) Wikimedia Commons, 14 December 2025the cab end: the Class 720's cab side window, cab door and joints on a 710 (front three-quarter, distant; layout only; set AV)
- New train livery: Bombardier Aventra five-car side elevations and cab fronts Greater Anglia (artwork by Bombardier Transportation), 24 February 2017the cab end's pieces: the Class 720's, measured on this drawing and shared (cab_part, set AV)
- 710 256 (photograph, CC BY-SA 2.0) Hugh Llewelyn, Flickr, 26 April 2022the cab end's details: the nose panel's edge, the round cover, the cab door's rails (details follow-up, 11 October 2026; layout only)
- 710 256 (photograph, CC BY-SA 2.0) Hugh Llewelyn, Flickr, 26 April 2022the cab top: the orange front strip turning back under the black dome into the cantrail line (D7107, the 710's cab against the shared part, 11 October 2026; layout only)
- 710376 at London Euston 14 12 25 (54991522922).jpg (photograph, Foulger Rail Photos, CC BY-SA 4.0) Wikimedia Commons, 14 December 2025the cab top: the black dome and the orange strip's turn (D7107, the 710's cab against the shared part, 11 October 2026; layout only)
- 710273 Barking Riverside A.jpg (photograph, kitmasterbloke, CC BY 2.0) Wikimedia Commons, 16 December 2022the door-leaf windows' size and height (set AV, AV9; open leaves, side on)
- Blackhorse Road Overground station 2019 1.jpg (photograph, Smiley.toerist, CC BY-SA 4.0) Wikimedia Commons, 14 October 2019the door-leaf windows' width and place in the leaf (set AV, AV9; a closed doorway, fitted projectively)
- New train livery: Bombardier Aventra five-car side elevations and cab fronts Greater Anglia (artwork by Bombardier Transportation), 24 February 2017the cab coupler's head face 265 mm ahead of the nose: the Class 720's overhang, the same cab and coupler (set C720K)
- Class 710 stock information sheet (released under FOI-0117-2425) Transport for Londonair-conditioned: one roof-mounted saloon air conditioning module per car (the sheet's HVAC line)
- New London Overground trains enter service on routes into London Liverpool Street Transport for London (press release), 3 March 2020the first 710s on Gospel Oak-Barking from May 2019; in service on the routes from Liverpool Street from 3 March 2020
- Transport for London completes Class 710 introduction RailAdvent, November 2020 (last updated 9 November 2020)the last Class 710 introduced in November 2020, and the Class 315s retired
- New London Overground Class 710/2 train obtains conditional approval to run Rail Engineer, 13 April 2019top speed: 75 mph (121 km/h), the limit in the ORR's first approval of the 710/2, April 2019; the trains first due in service in May 2018
- FirstGroup takes over London Overground operations from Arriva Rail, 6 May 2026operator: First Rail London since 3 May 2026, taking over from Arriva Rail London
- 710378, Richmond, June 26th 2025.jpg (photograph, CC BY-SA 4.0) Wikimedia Commons (Southsea_Matt), 26 June 2025a five-car 710 on the Mildmay line: 710378 working 2N93, the 14:42 Stratford to Richmond, 26 June 2025 (its Commons description)
- Richmond - Overground 378232 and 710375.jpg (photograph, CC BY-SA 4.0) Wikimedia Commons, 19 September 2025a five-car 710/3, 710375, in the Overground platforms at Richmond, 19 September 2025: the Mildmay line (photograph; layout only)
- Class 710 at Walthamstow Queen's Road.jpg (photograph, CC BY-SA 4.0) Wikimedia Commons (Elshad), 28 June 2019the cab coupler's head under the blue lower nose (front on, layout only)
- 710377 side on, in motion (photograph supplied by Kyle, 11 October 2026; Alamy, image 2GF3W99) Alamy (supplied by Kyle), supplied 11 October 2026the 710's own cab side window, nose joint and the orange strip's foot, close and side on (job aventra-fix, 12 October 2026; reference only, not reproduced)
- 710261 at Derby, front three-quarter (TfL/Bombardier press photograph, supplied by Kyle, 11 October 2026) Transport for London / Bombardier (supplied by Kyle), supplied 11 October 2026the orange strip sweeping into the lower orange line and the blue running to the front edge (front three-quarter; reference only, not reproduced)
- Blackhorse Road Overground station 2019 1.jpg (photograph, Smiley.toerist, CC BY-SA 4.0) Wikimedia Commons, 14 October 2019a centre car of 710261 (432361) with a large pale louvred case under it (oblique; its car type not confirmed)
- A Guide to Overhead Electrification (132787-ALB-GUN-EOH-000001, rev 10) Network Rail (prepared by Alan Baxter), February 2015, p. 39the contact wire in the In operation drawing: 15 ft 5 in (4.7 m) above rail, Network Rail's normal height
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unverified
- The saloon windows' height and frame: from three photographs (to about 40 mm) and TfL's sheet; the frame's tone is read off the photographs, not published
- The orange lines' heights: read on three photographs to about 40 mm, scaled on the drawing's own band top and body foot (TfL's sheet, not printed)
- Maximum speed (75 mph (121 km/h) is an approval limit for the 710/2, not a design figure)
- Build dates: Rail gives 2017–2020; TfL's sheet prints 2015–2019, from the contract (1 July 2015) to the planned finish; the last trains entered service in November 2020; no source dates the first car
- The gaps between cars (2 ft 4 in (716 mm) between bodies) are the Class 720's, measured on Bombardier's drawing of that Aventra, not a 710 figure; with them the drawn train is longer than its cars' printed lengths add up to, by 2 ft 4 in (716 mm) a join; TfL's 710 sheet (p. 2), too coarse to settle it, draws the gangway about 1 ft 5 in to 2 ft 1 in (440-625 mm; ±60 mm) at its three joins
- The cab coupler's parts: heights scaled on front views from the orange/blue line and the nose's foot (about 50 mm); along the train the head's face stands 265 mm ahead of the nose, the Class 720's measured figure (the same cab and coupler, set C720K), the other lengths estimated; no side-on photograph of a 710's coupler was found
- The underframe cases: outlines measured off the sheet's small drawings (to about 30 mm); tones from two photographs of the DMS and one of the PMS(W) at an angle; the MS's tones not photographed
- Wheels 2 ft 8 in (825 mm) new: Wikipedia's Class 345 page, citing Bombardier's 2018 bogie portfolio presentation (not seen), taken for every FLEXX Eco Aventra
- The cab end: the Class 720's profile, cab door and joint lines, measured on Bombardier's drawing of a 720 (set AV); the 710's own cab side window, nose joint and the orange strip's foot from Kyle's photograph of 710377, close and side on (job aventra-fix, 12 October 2026), with 710273 near side on (set C710C); no level photograph abeam the closed nose from far off was found (19 October 2026), so the front outline is untested
- The four-car AC unit's tare: TfL's sheet prints 144 t, but its own car weights add up to 145 t (39 + 36 + 31 + 39); the dual-voltage units' 151 t and 182 t add up (p. 1)
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