What is British Rail Classes 316 and 457?
{{Infobox DMU | name = British Rail Classes 316 and 457 | image = British Rail Class 457 - unit 7001 - vehicle 67300.JPG | caption = 67300 at [[Electric Railway Museum, Warwickshire]]. | interiorimage = | imagesize = 300px | interiorcaption = | background = #012545; color: white; | manufacturer = | family = | operator = [[British Rail]] | formation = 4 cars | numberbuilt = 1 | lines = | service = 1989 (as Class 457)<br>1990 (as Class 316) | refurbishment = | carlength = | width = | height = | weight = | capacity = | maxspeed = | gauge = Standard | traction = 750 V DC (Class 457)<br>25 kV AC (Class 316) | engine = | transmission = | safety = | coupling = }} '''Class 316''' and '''Class 457''' were two suggested [[TOPS]] classifications. They were given to a single [[electric multiple unit]] (EMU) at different stages of its use as a [[prototype]] for the [[Networker (train)|Networker]] series. {{Transport-stub}} {{Networker}} {{British Rail EMU}} [[Category:British Rail electric multiple units|457]]