text: Following the demise of Jarvis in 2010, and Fastline going into administration on 29 March 2010, these locomotives were placed in storage, being towed to Direct Rail Services' Carlisle Kingmoor and Crewe Gresty Lane depots for storage. During 2011, DRS repainted the five ex-Fastline locomotives and added them to their own fleet, keeping their original numbers.
  Poor working environment
  The British train drivers' union ASLEF has complained that the locomotives are unfit and unsafe to work in, citing excessive heat, noise levels and poor seating.
  In April 2007, ASLEF proposed a ban on their members driving the locomotives during the British summer 2007 period. Keith Norman, ASLEF's general secretary, described the cabs as "unhealthy, unsafe and unsatisfactory". Research showed that in July 2006, when the weather had been extremely hot, the number of incidents where a driver had passed a signal at danger (SPAD) increased. EWS entered into discussions and made amendments to a series of trial locomotives, GB Railfreight and Freightliner also investigated cab improvements. In June 2007, progress on the issue led ASLEF to withdraw its threat of industrial action.
  In Norway, CargoNet related complaints about the noise levels in the CD66 variant of the Class 66 resulted in higher pay rates for drivers.
  Accidents and incidents
  On 28 February 2001, 66521 was involved in the 2001 Great Heck rail crash which resulted in 10 deaths including the driver Stephen Dunn. The locomotive was written off and scrapped as a result of major damage sustained in the accident.