What is British Rail Class 175?
{{Infobox Train | background = | name = British Rail Class 175<br />''Coradia 1000'' | image = File:Hereford - Keolis Amey 175003 Carmarthen service.JPG | imagesize = 300px | caption = [[Transport for Wales]] 175003 at Hereford in 2018 | Manufacturer = [[Alstom]] | yearconstruction = 1999–2001 | Family = [[Coradia (train)|Coradia]] | Formation = 2 (175/0) or 3 (175/1) cars per trainset | Factory = Washwood Heath | numberbuilt = 27 trainsets | numberservice = | InService = 2000–2023 | Depots = Chester | Weight = {{convert|97.85|t|abbr=on|lk=on}} or {{convert|144.14|t|abbr=on}} per trainset | Capacity = 134 or 206 per trainset | CarBody = Steel | CarLength = Driving end vehicles {{convert|23.71|m|ftin|0|abbr=on}}<br />Centre cars {{convert|23.03|m|ftin|0|abbr=on}} | CarWidth = {{convert|2.73|m|ftin|0|abbr=on}} | doors = Swing plug at vehicle ends | art-sections = Flexible diaphragm within unit only | MaxSpeed = {{convert|100|mph|abbr=on}} | Brakes = Friction/Hydrodynamic | Gauge = {{RailGauge|sg|al=on|lk=on}} | Engine = [[Cummins]] N14 diesel - {{convert|450|hp|abbr=on}} 2100 rpm | Transmission = [[Voith]] T211 and ZF Voith final drive | Operator = [[Transport for Wales]] | SafetySystem = [[Automatic_Warning_System#British_Rail_AWS|AWS]], [[Train Protection & Warning System|TPWS]] | coupling = Scharfenberg|}} [[Image:175115 at Crewe.JPG|thumb|250px|175115 at [[Crewe railway station|Crewe]] on [[1 November]] [[2003]], with a late night [[First North Western]] service to [[Holyhead railway station|Holyhead]].]] [[Image:BR Class 175 Piccadilly ghost livery.jpg|thumb|250px|175110, at [[Manchester Piccadilly station|Manchester Picadilly]] on [[17 April]] [[2008]] in the 'ghostly' livery trialled by [[Arriva Trains Wales]]]] [[Image:ATW-175106-CardiffCentral-03.jpg|250px|thumb|right|175108, at [[Cardiff Central railway station|Cardiff Central]], in de-branded First North Western livery]] [[Image:175008 at Newport.jpg|250px|thumb|right|175008, at [[Newport railway station|Newport]], in the [[A