What is British Rail Class 03?
{{Infobox Locomotive |name = British Rail Class 03 |powertype = [[ Diesel-mechanical ]] |image = D2069 at Doncaster Works.JPG |caption = Class 03 D2069 at [[Doncaster railway works|Doncaster Works]] open day on 27 July 2003 |roadnumber = 11187–11209, 91, 92;<br />later D2000–D2199, D2370–D2399;<br />later 03004–03199, 03370–03399 |builder = [[British Rail|BR]] [[Swindon Works|Swindon]] & [[Doncaster Works|Doncaster]] |builddate = 1957–1961 |gauge={{RailGauge|ussg|lk=on}} |primemover = [[L Gardner and Sons Ltd|Gardner]] 8L3 |transmission = Wilson-Drewry CA5 R7, 5-speed [[epicyclic gearbox]], RF11 spiral bevel reverse and final-drive unit. |whytetype = [[0-6-0]] |uicclass = C |wheeldiameter = {{convert|3|ft|7|in|m|3|abbr=on}} |minimumcurve = {{convert|2|chain|m|lk=on}} |trainbrakes = Vacuum (some dual Air & Vacuum) |locobrakeforce = {{convert|13|LTf|kN|abbr=on|lk=in}} |wheelbase = {{convert|9|ft|0|in|m|2|abbr=on}} |length = {{convert|26|ft|0|in|m|2|abbr=on}} |width = {{convert|8|ft|6|in|m|2|abbr=on}} |height = {{convert|11|ft|10|in|m|2|abbr=on}} |locoweight = {{convert|30.2|LT|sigfig=3|lk=on}} |topspeed = {{convert|28.5|mph|km/h|abbr=on|lk=on}} |poweroutput = ''Engine:'' {{convert|204|hp|0|abbr=on|lk=on}}<br />''At rail:'' {{convert|152|hp|0|abbr=on}} |tractiveeffort = ''Max:'' {{convert|15650|lbf|kN|1|abbr=on|lk=on}} |fuelcap = {{convert|510|impgal|abbr=on|lk=on}} |trainheating = None |multipleworking = |axleloadclass = [[Route availability|RA 1]] |railroad = British Railways |retiredate = from April 1968 |disposition = One still in service, over 50 preserved, most scrapped }} The '''British Rail Class 03''' [[locomotive]] is, together with [[British Rail Class 04|Class 04]], one of BR's most successful smaller [[0-6-0]] [[diesel-mechanical]] [[shunter]]s. There are 230 members of the class and it was built by [[British Railways]]' [[Swindon railway works|Swindon]] and [[Doncaster railway works|Doncaster]] works in 1957-1962. They are numbered D2000-D2199 and D2370-D2399 (later 03004 to 03399). D2370 and D