The class 59 were the first class of locomotives built by General Motors Electromotive Division (GM-EMD) in the USA for use in Britain, the first five being ordered by Foster Yeoman to haul their stone trains on BR. In total, 15 were built between 1985-1995 for three different operators.
https://en.wikipedia.org/wiki/British_Rail_Class_57
All 15 are still operational with all but one now owned by Freightliner. The other locomotive (No.59003) is part of the GBRf fleet.
Tony