Following on from the (many!)deviations into liveries we get on here, I was a bit bored yesterday afternoon, and drifted off into thinking about pre nationalisation liveries, and a gap in my knowledge annoyed me! It concerned the GWR, and my question is, did they do any locos black? As far as I can tell, they were all green, the only difference between passenger and freight locos being that the passenger ones were lined. Is this correct for the 1923-47 period?