Introduced in 1998 a North American design developed from the class 59 and modified to work within the restricted UK loading gauge. Design classification JT42CWR they are now built by General Motors Electro Motive Division, They operate in other European mainland countries with more than 450 operating in the UK for several different operators. There are, of course, many detail differences.
Detail photos are available in some other collections for individual locomotives.
Good info on the class available http://class66.railfan.nl/
© Paul Bartlett's Photographs