66091 arrived in the UK in 1999 and, like the rest of the EWS fleet, was put straight into service. Like 66017, it was not initially fitted with auto-couplers or mirrors, gaining these during the mid-2000s. 66091 retained its EWS livery until June 2020, when it became the first to be repainted into plain DRS blue as part of a locomotive hire contract, along with a number of other DB Class 66s. It was returned to DB Cargo in early 2024 and reinstated to the DB fleet in full red livery in early 2025. On 19 July 2025, 66091 was named “Accurascale” in recognition of the charity work undertaken for DB Cargo’s charity partner and the funds raised through the previously produced 66190 “Martin House”.