Re the signal box colours - it seems that in the last half of the 1970s, BR must have bought a large quantity of white paint and many boxes were painted white all over. The preserved St Albans South box was treated this way in 1977 or 78, only to be closed in December 1979!
As to what boxes on the former GCR might have been painted, I am uncertain, as I cannot recall which BR Region was looking after it at closure. Maybe the present GCR as preserved might have some information?
As to what boxes on the former GCR might have been painted, I am uncertain, as I cannot recall which BR Region was looking after it at closure. Maybe the present GCR as preserved might have some information?