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Class 701 Arterio unverified

SWR's suburban train, an Alstom Aventra built at Derby in ten-car and five-car units. Branded Arterio, it has replaced the Class 455s and the five-car 458s on the routes out of Waterloo.

Class 701 Arterio, indicative only
Indicative only: No dimensioned drawing of the Class 701 has been published. It is the Class 710's measured Aventra body and cab (the 701 is also an Aventra), stretched to the 701's published car lengths (20.8 m and 19.9 m), in SWR's navy from a photograph of 701049; its own cab front, roof equipment and door count per car aren't drawn from a source. Drawn at 10 px per metre. Download SVG

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Type
Electric multiple unit
Builder
Bombardier Transportation (now Alstom), Derby
In service
since 2024
Operators
South Western Railway
Formation
10 cars (701/0) or 5 cars (701/5)
Trains in fleet
90
Fleets
South Western Railway: 90
Top speed
100 mph
Power
750 V DC third rail
Car width
2.78 m
Seats per train
556
Total capacity
Modern Railways (December 2019): ten-car 701/0 556 seated and 746 standing; five-car 701/5 274 seated and 361 standing (the standing density isn't stated)
Status
In service: 90 trains (60 ten-car, 30 five-car); SWR finished putting the 60 ten-car units into service in August 2026. Leased from Rock Rail.

This page is marked unverified: its figures haven’t yet been confirmed by an official source or a published history. The foot of the page says what’s in doubt.

Car types

CodeCarLengthDoors per side
DMDriving motor (DM), standard class20.80 m
PMMotor with pantograph provision ((P)M), standard class19.90 m
TLWTrailer with the accessible toilet and wheelchair spaces (TLW)19.90 m
M3Motor (M3), standard class19.90 m
EM1Motor (EM1), standard class19.90 m
EM2Motor (EM2), standard class19.90 m

Sources

How we source figures →

unverified car lengths (driving cars 20.8 m, intermediate cars 19.90 m) and width 2.78 m: Southern Electric Group's page only; no builder or lessor figure has been found, car designations are ORR's operator codes from the 2020 authorisation letter, whose table is laid out awkwardly; the five-car order DM-PM-TLW-M3-DM is read from the same table and from the Southern Electric Group (DMS-MS-TS-MS-DMS), door leaves: Modern Railways gives two sliding plug doorways a side at one-third and two-thirds; the number of leaves isn't stated in a source read, the five-car 701/5s: the Southern Electric Group's August 2026 review notes 'more class 701/5 units return from storage'; how many are in service isn't known