55018 (D9018) "BALLYMOSS" accelerates past Dringhouses yard, south of York, on the 12th May 1977 with the 1E17 10:35 Aberdeen - King’s Cross "The Aberdonian" service which it had worked from Edinburgh.
55018 was one of four Deltics which carried non-standard domino headcode blinds; 55003, 55010 and 55020 also carrying the smaller than average white dots as seen here.