Rolling stock › In serviceData updated
Class 777
Stadler's articulated four-car METRO train, designed for Merseyrail and bought outright by the Liverpool City Region rather than leased. A 3 ft 2 in (960 mm) floor and sliding steps give level boarding at all six doorways a side, and the cars are open from end to end. Seven Class 777/1s carry batteries and run beyond the third rail to Headbolt Lane.
Shown
Scale
213 ft (64.98 m) over couplers
Class 777 · schematic drawing GB Trains · gbtrains.uk/stock/777/ · CC BY 4.0
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Liveries 1
MerseyrailMerseyrailMerseyrail's yellow and graphite, colours sampled from photographsShown aboveSpecial liveries 1
- Eurovision 2023 wrap (777013) May 2023 vinyl wrap; also a decal across the fleet.
- Type
- Electric multiple unit (seven also battery-electric)
- Builder
- Stadler (bodyshells made in Hungary, bogies in Spain, final assembly in Switzerland and Poland)
- In service
- since 2023
- Operators
- Merseyrail
- Formation
- 4 cars, articulated and walk-through, 213 ft (64.98 m); two run together as eight cars
- Trains in fleet
- 53
- Fleets
- Merseyrail: 53
- Top speed
- 75 mph (120 km/h); 62 mph (100 km/h) on battery (777/1)
- Power
- 750 V DC third rail, 2,100 kW at the wheel (maximum); the 777/1s also carry a 320 kWh traction battery, with a range of 55 km in normal service (Stadler). Prepared for 25 kV AC overhead · how it works
- Bogies
- Stadler inside-framed trailer and Jacobs motor bogies
- Train length
- 213 ft (64.98 m)
- Coupled
- 2 × 4 cars, about 426 ft (130 m) (the units’ lengths added)
- Car height
- 12 ft 7 in (3.828 m)
- Car width
- 9 ft 3 in (2.82 m)
- Profile
- main-line
- Walk-through
- Yes
- Air-conditioned
- Yes
- Seats per train
- 184
- Total capacity
- 162 fixed and 22 tip-up seats, one class, and 302 standing at 4 people per m² (Stadler, 2020 and 2021); the 2016–17 design had 182 seats and 8 tip-ups, and 486 in all with two wheelchair spaces
- Status
- In service: 53 units (46 Class 777/0 and seven battery Class 777/1), owned by the Liverpool City Region Combined Authority and maintained by Stadler at Kirkdale and Birkenhead North. They replaced the Class 507s and 508s by November 2024.
unverified Some of these figures haven’t yet been checked against an official source or a published history. What’s in doubt ↓
Car types
| Code | Car | Length | Doors per side |
|---|---|---|---|
| DTS(B) | Driving trailer standard (DTS(B)) | 59 ft 6 in18.13 m | 1 double |
| MS | Motor standard (MS(C) and MS(D)) | 47 ft 1 in14.36 m | 2 double |
| DTS(A) | Driving trailer standard (DTS(A)) | 59 ft 6 in18.13 m | 1 double |
Sources
How we source figures → · Spotted a mistake? Tell us → (opens in a new tab)
Show the 28 sources from Wikimedia Commons, Stadler, Office of Rail and Road and 9 more
- METRO Merseyrail EMU, Merseytravel, Liverpool (data sheet MMER0921e) Stadler, 202152 four-car units ordered February 2017; 750 V DC; 213 ft (64,980 mm), 9 ft 3 in (2,820 mm) wide, 12 ft 7 in (3,828 mm) high; 3 ft 2 in (960 mm) floor; six 4 ft 3 in (1,300 mm) doorways a side; 162 seats and 22 tip-ups; 302 standing; 120 km/h (75 mph); 2,100 kW; prepared for 25 kV and ERTMS; authorised July 2021
- METRO Merseyrail EMU, Merseytravel, Liverpool (data sheet MMER1216e) Stadler, December 2016as designed: 182 seats and 8 tip-ups
- METRO Class 777 IPEMU, Merseytravel, Liverpool (data sheet MMER_IPEMU0922e) Stadler, September 2022777/1: owner Merseytravel; 184 seats; LTO-NMC battery of 320 kWh; 55 km range; 100 km/h (62 mph) on battery; battery under the end cars, cooling on the roof
- Stadler signs contract to build and maintain 52 metro trains for Liverpool City Region (media release) Stadler, 16 February 2017contract for 52 trains, 486 passengers (182 seated); maintenance for 35 years; Kirkdale depot
- First authorisation of Class 777 Mersey electric multiple units numbered 777001 - 777052 (letter to Stadler Rail Valencia) Office of Rail and Road, 15 July 2021first authorisation 15 July 2021, units 777001 to 777052; vehicles DTS(B), MS(C), MS(D), DTS(A); 75 mph (121 km/h); up to two units coupled; the vehicle numbers, DTS(B) 427001-427052, MS(C) 428001-428052, MS(D) 429001-429052 and DTS(A) 430001-430052, and 777040 to 777052 listed as plain 777s (Appendix 1, p. 4)
- Mersey Electrics Class 777 and system upgrade Rail Engineer (Malcolm Dobell), 23 February 202353 units, seven with batteries; first in service 23 January 2023; bodyshells from Hungary, bogies from Spain, assembly in Switzerland and Poland; air conditioning; tare 100 t; bought without a leasing company; three tonnes of batteries on each end car of the 777/1s; not all delivered to Liverpool by February 2023
- Table 6314: rolling stock vehicles by traction type and operator Office of Rail and Road, 20 November 2025Merseyrail's 212 electric vehicles, March 2025
- Merseytravel Merseyrail, accessed 7 October 2026trains bought and owned by the Combined Authority
- Rail history made yet again as Mayor hails the launch of the UK's first battery powered trains in the Liverpool City Region Merseytravel, 5 October 2023battery units serve Headbolt Lane from 5 October 2023; seven fitted
- Five months on: how UK's first battery-powered trains are faring at Headbolt Lane RAIL, 27 February 2024seven Class 777/1s; six one-tonne LTO batteries
- Merseyside's Royal Train departs for preservation Class 507 Preservation Society, 2 January 2025the 777s took over the last Class 507 workings in 2024
- Rolling Stock Class 777 Moves (notice 2021/S 000-004880) Find a Tender (Merseytravel), 10 March 2021Stadler's maintenance depots at Kirkdale and Birkenhead North
- British Rail Class 777 Wikipedia, accessed 7 October 2026the 777/1 numbers, citing Modern Railways (last resort)
- METRO Merseyrail EMU, Merseytravel, Liverpool (data sheet MMER0921e) Stadler, 2021, p. 2side elevation (measured): car bodies, articulations, bogies, doors (one doorway on each end car, two on each middle car, double leaves), windows, roof equipment, cab; the destination display in the second window from each cab (15 ft 0 in to 18 ft 8 in (4,560-5,700 mm) along, 7 ft 11 in to 8 ft 8 in (2,425-2,640 mm) up)
- Birkenhead North Depot - Merseyrail 777012 (photograph, CC BY-SA 4.0) Wikimedia Commons (Geof Sheppard), 8 September 2025livery placing and colours (layout and colour only)
- Stadler Rail - Merseyrail Class 777 (photograph of 777 001 at Stadler, Altenrhein, CC BY 2.0) Wikimedia Commons (Kecko, from Flickr), 25 April 2020livery colours, the orange line and the cab's black panel (colour and layout only)
- 777021 at Ormskirk (photograph, CC BY-SA 4.0) Wikimedia Commons (Matthew Black), 26 July 2025doors and window band (colour only)
- 777016 - BDL (a Class 777 at Birkdale, photograph, 30 May 2024, CC BY 2.0) Wikimedia Commons (SmoIchopper), 30 May 2024the cab end's trailer bogie: inside frame, the air spring's two folds, no daylight above the frame (layout only)
- 777020 & 507007 at West Kirby 190324 (photograph, CC BY-SA 2.0) Wikimedia Commons (Foulger Rail Photos), 19 March 2024the cab coupler's parts and their order along the train (side on, 2024; layout only)
- Stadler Rail - Merseyrail Class 777 (49827029117).jpg (photograph, CC BY 2.0) Wikimedia Commons (Kecko), 25 April 2020the cab coupler: a Dellner head and the electrical head below it, their heights (front three-quarter, 2020); the lower bodyside's lighter grey in sun, #575756-#605D5A, sampled under the saloon windows (set TFF, Kyle, 26 October 2026)
- Birkenhead North - Merseyrail 777034 West Kirby service.JPG (photograph, CC BY-SA 4.0) Wikimedia Commons (Geof Sheppard), 8 September 2025the cab-side black panel (its top, back edge and corners) and the cab door's drop-light with its transom, rectified on the cab door (2 ft 0 in × 6 ft 3 in (598 x 1,907 mm), Stadler's sheet); the cab side window's rounded corners; the silver strip's height near the cab and a doorway's leaf windows (set TF, 20 October 2026); the driver's two-tread step; the underframe's separate cases (photograph, 2025; measurement in the cab door's plane, layout elsewhere)
- Birkenhead North Depot - Merseyrail 777012 (photograph, CC BY-SA 4.0; 3,840 px copy) Wikimedia Commons (Geof Sheppard), 8 September 2025daylight under a driving car from about 26 ft 3 in to 38 ft 9 in (8.0 to 11.8 m) behind the nose; the saloon doorways' black frame, kick ledge, threshold and pale sill; the yellow band between the cab-side panel and the front; the lit destination displays in the driving car's second window and the MS(C)'s middle window; the silver strips' and the door-leaf windows' heights (set TF, 20 October 2026); the kick ledge's height and the lower bodyside's grey and its top edge (set TFF, Kyle, 26 October 2026); the vehicle numbers 94 70 0427012-2 (DTS(B), the car with the daylight) and 94 70 0428012-1 (MS(C)) (photograph, far side-on, 2025; heights scaled on the doorway)
- First Merseyrail Class 777 bodyshells complete RAIL, 1 October 2018the first bodyshells complete at Szolnok and in final assembly at Altenrhein by October 2018, with Siedlce taking a share from March 2019
- First authorisation of Class 777 Mersey electric multiple unit 777053 (letter to Stadler Rail Valencia, UK/51/2021/0052) Office of Rail and Road, 27 July 2021the 53rd unit, 777053, authorised 27 July 2021 (UK/51/2021/0052)
- Final Merseyrail Class 507s heading for scrap RAIL, 30 December 2024the last Class 507s going for scrap in December 2024 (headline only)
- Liverpool's battery-powered trains: a model for future rail expansion Rail Technology Magazine, June/July 2024the battery units' early teething problems, then four trains an hour to Headbolt Lane by mid-2024 (from a summary)
- Seventh heaven on the 777s Bus and Train User (blog), 26 January 2023describes 'grey lower panelling': the lower bodyside's lighter grey, drawn from the photographs (set TFF, Kyle, 26 October 2026)
- British Rail Class 777 Wikipedia, read 13 October 2026the livery, its unit and its dates
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unverified
- The 777/1 unit numbers (777140 to 777152, even numbers) are from Modern Railways (20 September 2022; paywalled, not read) via Wikipedia. 777140, 777142, 777148 and 777152 appear in dated photographs (Wikimedia Commons, 2023-2025); the ORR's 2021 authorisation lists 777040 to 777052 as plain 777s, so the 1xx numbers came from a later renumbering
- Built: the first bodyshells were complete and in final assembly by October 2018 (RAIL); the first unit reached Britain in January 2020, and not all had been delivered by February 2023 (Rail Engineer); no completion date found
- Which driving car is DTS(A) and which DTS(B): the ORR numbers them DTS(B) 427001-427052 and DTS(A) 430001-430052 (Appendix 1) but doesn't say which end is which; the drawing assumes its listing (DTS(B), MS(C), MS(D), DTS(A)) read left to right along Stadler's sheet. A level side-on photograph of a driving car with a readable vehicle number would settle it
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