What is British Rail Class 85?
{{Infobox Locomotive |name = British Railways AL5<br>British Rail Class 85 |powertype = Electric |image = File:85007 Carlisle.jpg |caption = 85007 at Carlisle |builder = [[British Railways]]’ [[Doncaster Works]] |builddate = 1961–1964 |totalproduction = 40 |gauge = {{RailGauge|ussg|lk=on|al=on}} |wheeldiameter = {{convert|4|ft|0|in|m|3|abbr=on}} |tractionmotors = {{convert|847|hp|abbr=on}} [[BTH]] 189, 4 off | transmission = |electricsystem = [[25 kV AC]] |whytetype = [[Bo-Bo]] |uicclass = Bo'Bo' |trainbrakes = Vacuum, Dual from 1968–1971 |locobrakeforce = {{convert|69|LTf|kN|sigfig=3|abbr=on|lk=in}} |locobrakes = Air |length = {{convert|56|ft|6|in|m|2|abbr=on}} |width = |height = |locoweight = {{convert|79.5|LT|sigfig=3|lk=on}} |topspeed = {{convert|100|mph|abbr=on|lk=on}} |poweroutput = {{convert|3200|hp|abbr=on|lk=on}} |tractiveeffort = {{convert|50000|lbf|sigfig=3|abbr=on|lk=on}} |trainheating = [[Electric Train Heating]] |railroad = [[British Rail]] |roadnumber = E3056–E3095; later 85001–84040 |axleloadclass = [[Route availability]] 6 |retiredate = 1981–1992 |disposition = One preserved, remainder scrapped }} The [[British Rail]] '''Class 85''' is an electric locomotive built during the early 1960s, as part of BR's policy to develop a standard electric locomotive. Five prototype classes (81-85) were built and evaluated, which eventually led to the development of the [[British Rail Class 86|Class 86]] locomotive. The locomotives of Class 85 were Originally fitted with [[germanium]] rectifiers which were eventually replaced by [[silicon]] rectifiers. Forty of these locomotives were built from 1961-64 by BR at [[Doncaster railway works|Doncaster]] Works. The class were used to haul trains on the then newly electrified [[West Coast Main Line]], from [[Birmingham]], to [[Crewe]], [[Manchester Piccadilly]], [[Liverpool]] and later [[Preston]]. By 1965, electrification had spread south to [[London Euston]]. Under the earlier BR classification, the type was given the designation '''AL5''' (meaning the 5th