What is British Rail Class 487?
{{Infobox train | background = #000f89;color:white | name = British Rail Class 487 | image = Class 487 at London Transport Museum Depot.jpg | imagealt = | imagesize = 300px | caption = A Class 487 at the London Transport Museum Depot | interiorimage = 487-DM-Inside1.jpg | interiorimagealt = | interiorcaption = The interior of a Class 487 DMBSO, looking towards the driving cab at the Bank end, with the 'hump' over the powered bogie. | service = 1940–1993 | manufacturer = [[English Electric]] | factory = [[Dick, Kerr & Co.|Dick, Kerr works]], Preston | family = [[British Rail tube trains|Tube]] | replaced = [[Waterloo & City Railway electric units|W&CR stock]] | yearconstruction = 1938–1940 | yearservice = 1940 | refurbishment = | yearscrapped = 1993 | numberconstruction = | numberbuilt = 28 vehicles (12 {{abbr|DMBSO|Driving Motor Brake Open Second}}, 16 {{abbr|TSO|Trailer Open Second}}) | numberservice = | numberpreserved = 1 vehicle | numberscrapped = 27 vehicles | successor = [[British Rail Class 482|Class 482]] | formation = One DMBSO, or two DMBSO flanking up to 3 TSO | fleetnumbers = DMBSO: 51–62<br>TSO: 71–86 | capacity = DMBSO: 40 seats, 40 standing<br>TSO: 52 seats, 52 standing | operator = [[Southern Railway (Great Britain)|Southern Railway]]<br>[[Southern Region of British Rail|British Rail Southern Region]]<br>[[Network SouthEast]] | depots = [[Waterloo Underground Depot|Waterloo (Waterloo & City line)]] | lines = [[Waterloo & City line]] | carbody = | trainlength = | carlength = {{convert|47|ft|0|in|m|frac=8|abbr=on}}<br>{{convert|49|ft|1+3/4|in|m|2|abbr=on}} | width = {{convert|8|ft|7+3/4|in|m|2|abbr=on}} | height = {{convert|9|ft|7|in|m|2|abbr=on}} | floorheight = | platformheight = | entrylevelorstep = | art-sections = | doors = | maxspeed = {{convert|35|mph|km/h|0|abbr=on}} | weight = | acceleration = | deceleration = | traction = Two [[English Electric|EE]] {{convert|190|hp|abbr=on}} traction motors per DMBSO | poweroutput = ''DMBSO:'' {{convert|380|hp|kW|0|abbr=on}} | transmission