text: In 2009, 73141 was acquired by First GBRf, with 73212 and 73213 following shortly afterward.
  Two locomotives, numbers 73211 and 73104, were completely rebuilt by Rail Vehicle Engineering Limited (RVEL) of Derby. The 600 hp diesel engine was removed and replaced by a pair of Cummins QSK19 750 hp diesel engines, increasing the total diesel horsepower to 1,500. The locomotives are used by Network Rail and are classified 73/9. The Cummins QSK19 is the same engine used in the Class 220 and Class 221 diesel multiple units. 73101 has been sold from preservation and will be added to the overhaul program. The first prototype of Network Rail's new 'Ultra73' locomotives was unveiled on Friday 13 June 2014 at RVEL in Derby.
  Both of Network Rail's Class 73/9s were put up for sale in August 2023 as surplus to requirements.
  RT Rail
  RT Rail acquired loco number 73107 from FM Rail in 2007, and had it overhauled and repainted at St. Leonards Depot.
  South Western Railway
  South West Trains inherited one locomotive, number 73109, which is used as a "Thunderbird" rescue locomotive. It was named in 1990 to commemorate the 50th anniversary of the Battle of Britain. It is affectionately known as "BoB" by rail enthusiasts.