What is British Rail Class 77?
{{Infobox Locomotive |name = British Rail Class 77 |powertype = Electric |image = 27000 at Crewe Works.JPG |caption = Preserved locomotive, no. 27000 in original black livery. |builder = {{ill|Gorton Locomotive Works|lt=BR Gorton Works|en}} |builddate = 1953–1954 |totalproduction = 7 |gauge = {{RailGauge|ussg|lk=on|al=on}} |tractionmotors = 6 x [[Metropolitan Vickers]] {{convert|415|hp|kW|abbr=on}}{{sfn|Gillham|1988|page=108}} |electricsystem = 1500 [[Volt|V]] [[Direct current|DC]] |collectionmethod = [[Pantograph (rail)|Pantograph]], x 2 |poweroutput = {{convert|2490|hp|0|abbr=on|lk=on}} |tractiveeffort = {{convert|45000|lbf|kN|abbr=on|lk=on}} |wheeldiameter = {{convert|4|ft|2|in|m|3|abbr=on}} |whytetype = Co-Co |trainbrakes = Vacuum |locobrakeforce = {{convert|85|LTf|kN|sigfig=3|abbr=on|lk=in}} |locobrakes = Air and electrical regenerative |length = {{convert|59|ft|0|in|m|2|abbr=on}} |width = |height = |locoweight = {{convert|102.5|LT}} |maxspeed = {{convert|90|mph|0|abbr=on|lk=on}} |trainheating = [[Steam generator]] |operator = [[British Railways]] (1954-1968)<br>[[Nederlandse Spoorwegen]] (1968-1986) |fleetnumbers = 27000–27006 |axleloadclass = |retiredate = 1968 (UK)<br>1986 (Netherlands) |disposition = Three preserved, remainder scrapped }} The [[British Rail]] '''Class 77''',<ref>{{cite book |editor-last1=Percival |editor-first1=David |date=1985 |title=Railway World Annual 1986 |url=https://archive.org/details/railwayworldannu0000unse_e2h8/mode/2up |url-access=registration |location= |publisher=Ian Allan Publishing |page=99 |isbn=9780711015067 |access-date= |via=[[Internet Archive]]}}</ref> also known as '''Class EM2''', is a class of 1.5 kV DC, [[Co-Co]] [[electric locomotive]]. They were built by [[Metropolitan Vickers]] in 1953–1954 for use over the {{ill|Woodhead Line|en}} between [[Manchester]] and [[Sheffield]]. These were the bigger and more powerful version of the [[British Rail Class 76|Class 76]] (EM1) to haul [[passenger train]]s. Once the Woodhead Line lost passenger trains, all of the C