This loco has been out and about on the main line recently so its rail blue livery has developed a rather pleasing weathered appearence.
Looking as if it was taken straight out of the 1970's is 55019 'Royal Highland Fusilier'
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Doncaster 150 Open Weekend Saturday 26th July 2003

Photo from James & Martin's Picture Collection Copyright 'Jampics' m.hawkes7@ntlworld.com