Greater Anglia's 321321 undergoes attention inside Clacton's small depot. Built

by BREL at York between 1988 and 1991 these one hundred miles per hour units proved to be incredibly reliable and marked a step-change in the travelling experience for many commuters in the south-east. Their roles have evolved over the years with them being cascaded as new stock has been introduced but they are still going strong now being twenty-five years old.