The last mainline diesel locomotive type built for British, the Class 60 arose from the arrival, and subsequent success, of the Class 59 locomotive. With a haulage capacity and reliability superior to the Class 31, 37 and 47 locomotives in sector service at the time, Trainload Petroleum, Metals, Construction and Coal were prompted to lobby for a new UK designed locomotive to match it. British Rail Board eventually secured the necessary treasury and following a difficult procurement process, the contract was finally awarded to Brush Electrical Machines of Loughborough on May 17, 1988 for 100 locomotives.
Brush’s design incorporated many features from the Class 59’s specification, as well as their own Sepex traction control system, tested on the Class 58, to improve adhesion. The Class 60s were geared for a maximum speed of 62 mph, the power units being 8 cylinder, 145 litre Blackstone 8MB275T diesel traction engines built by Mirrlees at their Stockport works, delivering a maximum power output of 3,100hp at 1000rpm. The bodyshell, shared with the Class 92 locomotives, was of a monocoque, stressed skin construction with diagonal trusses, the external bodywork providing support for the internal components and all were built by Procor (UK) of Wakefield.
The first locomotive was handed over to Railfreight on time in June 1989, but extensive teething problems (many involving computer software) meant that it took 16 months before the first of the Class were accepted and nearly 4 years to introduce all 100 of the Class 60 locomotives to service. By the time the Class 60 fleet entered service, Trainload’s Sector businesses had given way to "shadow” privatisation and the formation, in 1994, of Loadhaul, Transrail and Mainline Freight with the Class 60 fleet split equally between them. English, Welsh and Scottish Railway bought the whole Class 60 fleet as part of British Railway’s privatisation, reallocating the entire Class 60 fleet to Toton as a cost cutting measure and to pool common parts. By 2003/4, a number of locomotives were stored as surplus to operational requirements.
In 2007 EWS became part of DB Schenker and at the end of October 2010, the entire Class 60 fleet was mothballed, with the exception of 60040 The Territorial Army Centenary and 60074 Teenage Cancer Trust. By the end of 2011, two more locomotives were returned to service, followed by an announcement that twenty one further Class 60s were to be overhauled in 2012, this being completed by the end of 2013. In June 2014, Colas Rail purchased ten locomotives and by February 2016 there were twenty four operational locomotives.
Previously named John Logie Baird, locomotive 60066 was accepted into service by British Rail on August 22, 1991, being allocated to Immingham TMD in Trainload Coal Livery. Following its appearance in Drax’s ‘Powering Tomorrow’ livery, for use with the new Biomass wagons, 60066 was moved to storage at Toton TMD in March 2014 following damage sustained at Liverpool bulk terminal.