Sub-classes
Minor differences between different orders, and different operating companies have resulted in a number of subclasses being defined.
| Subclass | Number built | TOPS number range | Operators | Comments |
|---|---|---|---|---|
| 66/0 | 250 | 66001-66250 | DB Schenker | The original order of 250. The first loco arrived at Immingham in 1998. 60 EWS locomotives lent from EWS stock to EWSi subsidiary Euro Cargo Rail although some are back in the UK now. DBS are now sending locos to Poland. |
| 66/3 | 5 | 66301-66305 | Direct Rail Services | Originally ordered by Fastline Freight. Now in use with Direct Rail Services. |
| 66/4 | 9 | 66411-66420 | Freightliner | Acquired from DRS in 2011. Three exported for use in Poland (FPL), 66411, 66412 & 66417. |
| 66/4 | 15 | 66421-66434 | Direct Rail Services | Intended use is on intermodal traffic. Occasionally used on nuclear flask traffic - for which they are overpowered. |
| 66/5 | 85 | 66501-66520, 66522-66572, 66585, 66587-66599 | Freightliner | Replaced Class 47s and Class 57s on Intermodal freight. 66521 written-off after Selby rail crash. 66582, 66583, 66584 and 66586 have been exported to Poland, the operating subsidiary Freightliner PL. |
| 66/6 | 19 | 66601-66607, 66610, 66613-66623 | Freightliner | Top speed of 65 mph (105 km/h) - reduced gearing to cope with heavier oil, aggregates and cement trains. 66608, 66609, 66611, 66612, 66624 and 66625 have been exported to Poland, the operating subsidiary Freightliner PL. |
| 66/7 | 37 | 66701-66749 | GB Railfreight | Operates on coal, intermodal services and also engineering / departmental work for Metronet and Network Rail on London's underground and national rail lines.
|
| 66/8 | 5 | 66846-66850 | Colas Rail | Former operated by Freightliner 66573-66577. |
| 66/9 | 7 | 66951-66957 | Freightliner | A lower emission variant - fuel capacity reduced to compensate for the increased weight of other components. |
Read more about this topic: British Rail Class 66