# British Rail Class 756

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{{Short description|Tri-mode multiple-unit passenger train}}
{{Use dmy dates|date=July 2025}}
{{Use British English|date=March 2017}}
{{Infobox train
| background = #AE0000
| name = British Rail Class 756<br />''FLIRT''
| image = TfW Rail 756117 at Aberdare 19 November 2024.jpg
| imagealt = 
| caption = Class 756 unit at [Aberdare](/source/Aberdare_railway_station) in November 2024
| interiorimage = TfW Rail 756117 interior 19 November 2024.jpg
| interiorimagealt = 
| interiorcaption = Interior of a Class 756 unit
| stocktype = 
| service = 15 November 2024-Present<ref name="entrytoservice">{{cite tweet |title= Another new class in service from today - two @tfwrail tri-mode Class 756s are in traffic on the Cardiff-Merthyr Tydfil and Cardiff-Aberdare routes - 4-cars 756107 and 756116. There are seven 3-cars and 17 4-cars in this fleet built by Stadler. 📷 TfW |user=todaysrailways |number=1857377099926942166 |access-date=15 November 2024 |publisher=[@TodaysRailways](/source/Today's_Railways_UK)}}</ref>
| manufacturer = [Stadler Rail](/source/Stadler_Rail)
| designer = 
| assembly = Stadler Bussnang AG
| ordernumber = 
| factory = [Bussnang](/source/Bussnang), [Switzerland](/source/Switzerland)<ref name="testbegin">{{cite news |title=Testing Begins on New FLIRTs for TfW |url=https://www.railvolution.net/news/testing-begins-on-new-flirts-for-tfw |access-date=27 December 2022 |work=Railvolution |publisher=Railway Public s.r.o. |date=29 July 2021 |archive-url=https://web.archive.org/web/20210802160823/https://www.railvolution.net/news/testing-begins-on-new-flirts-for-tfw |archive-date=2 August 2021 |location=Praha |url-status=live}}</ref>
| family = [''FLIRT''](/source/Stadler_FLIRT)
| replaced = {{ubl|{{brc|150}}|{{brc|153}}|{{brc|769}}}}
| yearconstruction = 2021–2023<ref name="pb4">{{cite book |last=Pritchard |first=Robert |title=British Railways Pocket Book No. 4: Electric Multiple Units |publisher=Platform 5 Publishing |year=2022 |isbn=978-1-909-43183-6 |edition=36th |location=Sheffield |pages=132–133}}</ref>
| yearservice = 
| refurbishment = 
| yearscrapped = 
| numberconstruction = 
| numberbuilt = 24<ref name="entrytoservice"/><br>(7 × 756/0, 17 × 756/1)
| numberservice = 
| numberpreserved = 
| numberscrapped = 
| predecessor = 
| successor = 
| formation = {{ubli|indent=1em|3-car units:{{efn|name=powerpack|The Power Pack is technically a fourth or fifth vehicle in these units, but as it contains no passenger accommodation it is excluded from the count of passenger cars.}}|{{abbr|DMS|Driver's cab, Motor car, Standard class (open saloon)}}-{{abbr|PP|Power Pack}}-{{abbr|PTSW|Pantograph, Trailer car, Standard class (open saloon), Wheelchair accommodation}}-DMS|4-car units:{{efn|name=powerpack}}|DMS-{{abbr|PTS|Pantograph, Trailer car, Standard class (open saloon)}}-PP-PTSW-DMS}}
| diagram = 
| code = 
| fleetnumbers = {{ubl|756/0: 756001–756007|756/1: 756101–756117<ref name="pb4" />}}
| capacity = {{ubl|3-car: 118 seats,<br />plus 24 tip-up {{avoid wrap|and 148 standees}}|4-car: 158 seats,<br />plus 32 tip-up {{avoid wrap|and 204 standees}}}}
| owner = [SMBC](/source/Sumitomo_Mitsui_Banking_Corporation) Leasing<ref>{{cite magazine |title= Time to take stock as the 'bubble' bursts…|magazine=[Rail Magazine](/source/Rail_Magazine) |issue=989|date=9 August 2023 |pages=42–47}}</ref> and [Equitix](/source/Tetragon_Financial_Group)<ref>{{cite web |title = Case Study: Wales & Borders – Commercial and Contract Management |url=https://apex-rail.com/casestudy/smfg |publisher = Apex Rail |access-date = 27 August 2025}}</ref>
| operator = [Transport for Wales Rail](/source/Transport_for_Wales_Rail)
| depots = [Canton](/source/Cardiff_Canton_TMD) ([Cardiff](/source/Cardiff))
| lines = 
| carbody = [Aluminium](/source/Aluminium)
| trainlength = {{ubl|3-car: {{cvt|65.0|m|ftin}}|4-car: {{cvt|80.7|m|ftin}}}}
| carlength = 
| width = {{ubl|Passenger vehicles:<br />{{cvt|2.720|m}}|Power Pack:<br />{{cvt|2.822|m}}<ref>{{cite book |title=Bi-Mode Multiple Unit - FLIRT - Greater Anglia, UK |date=27 August 2018 |publisher=Stadler Rail Group |location=Bussnang |url=https://www.stadlerrail.com/media/pdf/feabmu0819_en.pdf |access-date=1 August 2019 |ref=755datasheet |id=FEABMU0819e |archive-url=https://web.archive.org/web/20231029170819/https://www.stadlerrail.com/media/pdf/feabmu0819_en.pdf |archive-date=29 October 2023 |url-status=live}}</ref>}}
| height = {{cvt|3.915|m|ftin}}
| lowfloor = 
| floorheight = {{convert|960|mm|ftin|abbr=on}}
| platformheight = 
| entrylevelorstep = 
| doors = Double-leaf sliding plug, {{avoid wrap|each {{cvt|1.300|m|ftin}} wide}}<br />(total 5 per side per 3-car, {{avoid wrap|7 per side per 4-car)}}
| art-sections = 
| wheeldiameter = {{ubl|Powered: {{cvt|870|mm|in}}|Unpowered: {{cvt|760|mm|in}}}}
| wheelbase = Bogies: {{cvt|2.700|m|ftin}}
| maxspeed = {{convert|75|mph|km/h|0|abbr=on}}
| weight = 
| axleload = 
| steep gradient = 
| traction = [IGBT](/source/Insulated-gate_bipolar_transistor)
| engine = 
| enginetype = 
| displacement = 
| traction motors = 
| poweroutput = {{ubl|On AC power:|{{cvt|2600|kW}}|On battery power:|{{cvt|1300|kW}}|On diesel power:|{{cvt|480|kW}}}}
| tractiveeffort = Maximum starting:<br />{{convert|200|kN|lbf|abbr=on}}
| acceleration = Maximum starting:<br />{{cvt|1.1|m/s2|mph/s}}
| deceleration = 
| aux = 
| powersupply = 
| hvac = 
| electricsystem = {{25 kV 50 Hz}} [overhead](/source/Overhead_line)
| collectionmethod = [Pantograph](/source/Pantograph_(transport))
| uicclass = {{ubl|3-car: Bo′2′2′2′Bo′|4-car: Bo′2′2′2′2′Bo′}}
| bogies = 
| minimum curve = 
| brakes = 
| safety = {{ubl|[AWS](/source/Automatic_Warning_System)|[TPWS](/source/Train_Protection_%26_Warning_System)|(plus provision for [ETCS](/source/European_Train_Control_System))}}
| coupling = 
| multipleworking = Within class (max. 2 units)
| gauge = {{Track gauge|uksg|allk=on}}
| notes = Sourced from <ref name="Stadler0922">{{cite book |title=FLIRT Trimodal Multiple Unit - Transport for Wales |date=6 September 2022 |publisher=Stadler Rail Group |location=Bussnang |id=FWBBMU0922e |url=https://www.stadlerrail.com/media/pdf/fwbtri0922e.pdf |access-date=3 December 2020 |archive-url=https://web.archive.org/web/20231029170851/https://www.stadlerrail.com/media/pdf/fwbtri0922e.pdf |archive-date=29 October 2023 |url-status=live}}</ref> unless otherwise noted.
}}

The '''British Rail Class 756 ''FLIRT'''''<ref>{{cite tweet |author=Transport for Wales Rail |user=tfwrail |number=1201451956268654592 |date=2 December 2019 |title=Lastly, our innovative tri-mode Metro trains which will enter service on the Rhymney, Coryton & Vale of Glamorgan lines in 2023, will be Class 756 }}</ref> is a class of [tri-mode multiple unit](/source/Electro-diesel_multiple_unit)s built for [Transport for Wales Rail](/source/Transport_for_Wales_Rail) by Swiss rolling stock manufacturer [Stadler Rail](/source/Stadler_Rail). They are closely related to the {{brc|755}} bi-mode units delivered by Stadler to [Greater Anglia](/source/Greater_Anglia_(2012%E2%80%932025)) between 2018 and 2020, which can be powered either by overhead electric lines or on-board diesel generators. The Class 756 units also carry batteries as an additional source of traction power.<ref>{{Cite web |date=27 November 2024 |title=Tri-mode trains launch South Wales Metro electric services |url=https://www.railwaygazette.com/uk/tri-mode-trains-launch-south-wales-metro-electric-services/67896.article |access-date=12 January 2025 |website=Railway Gazette International }}</ref>

A total of 24 units were built, split between 7 three-car units and 17 four-car units.<ref name="entrytoservice" />

==History==
The [Wales & Borders rail franchise](/source/Wales_%26_Borders_franchise), awarded to [KeolisAmey Wales](/source/KeolisAmey_Wales) with effect from 14 October 2018, included a commitment requiring that the operator oversee a full fleet replacement during the franchise period.<ref>{{cite news |title=KeolisAmey reveal new-look Wales trains and services |url=https://www.bbc.co.uk/news/uk-wales-44316772 |work=BBC News |publisher=British Broadcasting Corporation |date=4 June 2018 |access-date=4 June 2018 |archive-date=27 January 2021 |archive-url=https://web.archive.org/web/20210127232051/https://www.bbc.com/news/uk-wales-44316772 |url-status=live }}</ref> As part of this process, KeolisAmey placed an order with Stadler in February 2019 for the 24 FLIRT tri-mode units that came to be designated Class 756. The tri-mode capabilities are intended to facilitate operations over lines that have only been partially [electrified](/source/Railway_electrification_system). Production of the fleet was underway by mid-2021.<ref name="testbegin" /> 

The Class 756 officially entered service on 18 November 2024, and for consecutive days,<ref>{{Cite web |date=18 November 2024 |title=Britain's first Tri-mode trains enter service in Wales |url=https://www.railadvent.co.uk/2024/11/britains-first-tri-mode-trains-enter-service-in-wales.html |access-date=20 November 2024 |website=RailAdvent}}</ref> after initially entering service on one previous day of 15 November 2024.<ref name="entrytoservice"></ref>

==Operators==
===Transport for Wales===
[Transport for Wales Rail](/source/Transport_for_Wales_Rail) Class 756 units currently operate services between Cardiff-Merthyr Tydfil, Cardiff-Aberdare and Cardiff-Treherbert.<ref name="entrytoservice"/>

It is expected that the Class 756 units will move across to the Rhymney Line from late 2025 as the [Class 398](/source/British_Rail_Class_398) [tram-trains](/source/Tram-train) enter service.<ref>{{Cite web |title=First electric trains to be introduced to South Wales Metro |url=https://news.tfw.wales/news/first-electric-trains-to-be-introduced-to-south-wales-metro |access-date=18 November 2024 |website=Transport For Wales News |language=english}}</ref>

==Technical details==
Class 756 units have three or four passenger vehicles, along with a separate "Power Pack" vehicle near the centre of the unit that contains a diesel generator set and three battery modules.<ref name="shows">{{cite news |last1=Fender |first1=Keith |last2=Sherratt |first2=Philip |title=Stadler shows trains for the UK at InnoTrans |url=https://www.modernrailways.com/article/stadler-shows-trains-uk-innotrans |access-date=27 December 2022 |work=Modern Railways |publisher=Key Publishing |date=20 September 2022 |archive-url=https://web.archive.org/web/20220920152809/https://www.modernrailways.com/article/stadler-shows-trains-uk-innotrans |archive-date=20 September 2022 |location=Stamford |url-status=live}}</ref> The diesel generator produces {{cvt|480|kW|hp}}, while the batteries are capable of supplying up to {{cvt|1300|kW|hp}}.<ref name="Stadler0922" /> All vehicles are linked by unpowered [Jacobs bogie](/source/Jacobs_bogie)s, while the outermost bogie at each end of each unit carries the traction motors.<ref name="Stadler0922" />

The batteries use [lithium-titanium-oxide](/source/Lithium-titanium-oxide_battery) chemistry, with the capacity of 447&nbsp;kWh for 3-car units and 559&nbsp;kWh for 4-car units.<ref>{{Cite web |date=8 May 2025 |title=Class 756 battery chemistry - a Freedom of Information request to Transport for Wales Rail Limited |url=https://www.whatdotheyknow.com/request/class_756_battery_chemistry |access-date=7 June 2025 |website=WhatDoTheyKnow |language=en}}</ref>

==Fleet details==
{| class="wikitable"
!Subclass
!Operator
!Qty.
!Year built
!Passenger cars
!Unit nos.<ref name="pb4" />
|-
!756/0
|rowspan=2|[Transport for Wales Rail](/source/Transport_for_Wales_Rail)
|align=center|7
|align=center rowspan="2"|2021–2023
|align=center|3
|756001–756007
|-
!756/1
|align=center|17
|align=center|4
|756101–756117
|}

===Illustration===
{{Wide image|TfW Class 756 4 Car w-pantograph.png|x80px|Illustration of a four-car Class 756 unit (based on concept art)}}

==See also==
* [British Rail Class 231](/source/British_Rail_Class_231) – A diesel multiple unit variant of the Stadler ''FLIRT UK'' platform also built for Transport for Wales Rail
* [British Rail Class 745](/source/British_Rail_Class_745) – An electric multiple unit variant of the Stadler ''FLIRT UK'' platform built for [Greater Anglia](/source/Greater_Anglia_(2012%E2%80%932025))
* [British Rail Class 755](/source/British_Rail_Class_755) – A bi-mode multiple unit variant of the Stadler ''FLIRT UK'' platform built for Greater Anglia

==Notes==
{{notelist}}

==References==
{{Commons}}
{{reflist|40em}}<!--size limit prevents ref spill under infobox; may be removed when article is longer than infobox-->

{{UK Stadler trains}}
{{British Rail DMU|state=collapsed}}
{{British Rail EMU|state=collapsed}}

756
Category:Stadler Rail multiple units
Category:Hybrid multiple units of Great Britain
Category:25 kV AC multiple units
Category:Train-related introductions in 2024
Category:Battery electric multiple units

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Adapted from the Wikipedia article [British Rail Class 756](https://en.wikipedia.org/wiki/British_Rail_Class_756) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/British_Rail_Class_756?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.
