Thanks very much, all, very useful information
Weren't coaches of similar sizes as 1097 (at the time), such as 1142, built for the Rosslaire express? If so, would 1097 have carried what would be, "GSR," brown and cream? If so, would this have been similar to the livery 836 used to have - like vermillion and yellow lining? I have a feeling that the brown in GSR brown and cream was a good bit lighter, but would that have been a much later (1930s) feature?