Those attending the Doncaster Railex weekend at the railway works in June 1978 could be forgiven for thinking 55004 (D9004) "QUEEN'S OWN HIGHLANDER" was fresh from overhaul and ready for release. In reality 55004 was facing a very dubious future; the locomotive had arrived on works on the 27th April 1978 and was placed in a long line of locomotives awaiting power units. Power unit spares had become scarce and industrial action at the 'Plant' had led to poor availability of Deltics during 1978 and at one point during October of that year thirteen of the class were languishing in Doncaster out of action. 55004 would become one of the long-stayers along with class mates 55001 (D9001) "ST. PADDY", 55016 (D9016) "GORDON HIGHLANDER" and 55020 (D9020) "NIMBUS" and would not see release back into traffic until December 1979. 55016 also escaped, however 55001 and 55020 did not and were cut-up in early 1980. Here 55004 stands on the lawn in front of the Crimpsall erecting shops on the second day of the Railex weekend on Sunday 18th June 1978, the locomotive had been prepared for the open days merely as a static exhibit and had paid a brief visit to the paintshop where its yellow ends and buffer beam equipment had been refreshed.