Having been too late for a Heavy General Repair (HGR) 55018 (D9018) "BALLYMOSS" is seen in the dismantling shop at Doncaster Works, on Sunday 17th July 1977, with the legend "INTER"  chalked on the side, denoting its pending Intermediate overhaul.
HGR's had ceased earlier in the year following the decision to withdraw the class from service sooner than originally expected. This would be 55018's final Intermediate overhaul and would see certain characteristics altered, including the plating over of the route indicators which became redundant in 1974 following the cessation of four character headcodes. Cost was the largest factor that saw the class cut-back on repairs and even the plating over of route indicators would cease at Doncaster by 1979. 55018 had arrived for repair at Doncaster on the 30th June and would not return to service until the 10th of December.