What is British Rail Class 319?
{{Infobox EMU |name = British Rail Class 319 |image = Northern_319370_at_Huyton.jpg |imagesize = 300px |caption = [[Arriva Rail North]] 319370 at {{stnlnk|Huyton}} in 2018 |Manufacturer = [[BREL]] York |Family = |Operator = [[Northern trains]] |Formation = 4 cars per trainset |Built = 86 trainsets |LinesServed = [[Abbey Line]]<br>[[Liverpool to Manchester Lines]]<br>[[Liverpool to Wigan Line]] |InService = 1987 - present |MaxSpeed = 100 [[mph]] (161 km/h) |Gauge = [[Standard gauge]]: 1,435 mm (4 ft 8½ in) |Voltage = 25 [[volt|kV]] [[Alternating current|AC]] [[Overhead lines]] or 750 V [[Direct current|DC]] [[3rd rail]] |numberscrapped=13|Number in service=21}} The [[British Rail]] '''Class 319''' dual-voltage [[electric multiple units]] (EMU) were built by [[BREL]] [[York]] in two batches from 1987–88 and 1990. The trains were introduced for new north-south cross-[[London]] services from [[Bedford]] to [[Brighton]], and since privatisation these services have been operated by [[Thameslink (train operating company)|Thameslink]] and [[First Capital Connect]], the former franchise having been merged with the Great Northern section of the former [[West Anglia Great Northern|WAGN]] franchise to form the latter [[train operating company]] at 0200 BST on 1 April 2006 as a result of re-franchising. Class 319 units have dual power pick-up, from either 25 [[volt|kV]] [[alternating current]] (AC) [[overhead lines]] for services north of London, or 750 V [[direct current]] (DC) [[third rail]] to the south. However, some units were only used on outer suburban services in South London. The [[British Rail Class 325|Class 325]] postal units were based on the Class 319 units, with the same traction equipment and body design, but are fitted with cabs of the same design as the newer [[British Rail Class 365|Class 365]] and [[British Rail Class 465|Class 465]] ''Networker'' units. Since delivery of new rolling stock for Thameslink services started in 2015, a number of Class 319 units have been redeployed for use on other operat