At the end of the 1980s a fleet of fifty Class 90 electric locomotives was to commence service for British Rail. The rail privatisation in the following decade saw the fleet divided between a number of private operators, including Virgin Trains and Rail Express Systems. Their duties were soon to extend to both passenger and freight work across most of the country’s electrified network.While some examples have been sidelined for a number of years, the majority of the fleet is still going strong as it approaches its fortieth anniversary in traffic. During that time, these locomotives have sported a variety of liveries, reflecting their diverse ownership and usage. The class spent many years at work on passenger duties along the length of the West Coast Main Line as well as Great Eastern flagship services between London and Norwich. These stalwarts even made appearances on both Anglo-Scottish sleeper services and were frequently hired in to perform East Coast Main Line passenger duties between King’s Cross and Yorkshire. Often operating in pairs, the class was used by both Freightliner and DB Cargo for their longer distance container workings, again where the power supply allowed. John Jackson highlights the diversity of the class with photographs from all electrified corners of the UK railway network across their four decades at work, proving they still have their worth on the network today.