The Class 66 is a Co-Co diesel-electric freight locomotive introduced to Britain in June 1998. Over 500 locomotives were built, the final one being delivered to GB Railfreight in the spring of 2016. No. 66773 was delivered to GB Railfreight in 2016, entering the UK via Newport docks onboard the ship ‘MV Happy Dragon’. In 2019 GB Railfreight named the locomotive ‘Pride of GB Railfreight’, a name chosen by columnist Mathew Paris of The Times. The name, along with the addition of rainbow colouring to its livery, recognises LGBT+ employees across the rail industry and GBRf’s commitment to diversity and equality.