'Dutch' grey and yellow livery, similar to that of Nederlandse Spoorwegen. 37 093 was mocked up as a "police" locomotive which pulled over a Class 43 HST power car for speeding in an InterCity 125 advert broadcast in the 1980s. TOPS renumbering As with many diesel classes, the TOPS renumbering was implemented in a straightforward manner, with the locomotive numbers remaining in sequence. Thus 6701 became 37001 and D6999 became 37299; while D6600–D6608 became 37300–37308. The remaining locomotive, D6700 became 37119, instead of D6819, which became 37283, the number being unused as D6983 was destroyed in an accident in 1965. As members of the class were altered later in their careers, they were renumbered, some more than once. D6983 was withdrawn in December 1965 following a fatal collision with a derailed Class 47, number D1671 "THOR", in South Wales, near Bridgend as the result of a landslip. D6983 was the first EE Type 3 to be withdrawn and as a result, the only locomotive in the entire class not to receive a TOPS number. The remains of both locomotives were sold to local scrap merchants, R.S. Hayes, and cut up the following year. Sub-classes In the 1980s the Class 37 locomotives were extensively refurbished from that point 37/0 refers to the original version. The work took place at British Rail Engineering's Crewe Works except for the 37/3 subclass whose bogies were replaced at various depots. Class 37/0 This designation covered all 309 locomotives as built, but with such a large number of locomotives and with two companies involved in the building, there were several differences within this sub-class alone. The most visible external difference was that the first 119 locos (originally) had a "split" headcode box; for these locos the four digit train reporting number was shown in two square boxes, each containing two digits and separated by a pair of connecting doors, designed to allow the train crew to be exchanged while in motion. Later locomotives had a single centrally placed headcode box and also had the horns mounted on the roof, rather than built into the nose of the locomotive. This difference was the reason for the double change in numbers (involving D6700 and D6819) when implementing the TOPS scheme described earlier. Class 37/3 There were two incarnations of a 37/3 subclass. The first was a group of 12 Motherwell allocated locos that were fitted with strengthened couplings