Under the earlier BR classification, the type was given the designation AL5 (meaning the 5th design of 25 kV AC Locomotive), and locomotives were numbered E3056-E3095. In 1968, this was changed to Class 85, when BR introduced a new computer numbering system. From 1971 onwards, locomotives were progressively renumbered into the 85001-040 series. Fifteen locomotives were converted for freight only use, numbered in the 85/1 series. These locomotives were restricted to 80 mph. 