Jawfin, queries are one of the very reasons to be on here, so ask away at any time - there is someone on here who will be sold to answer any question you have.
1097 was started in 1924, under the GSWR, but entered traffic just into the new year in 1925. It would have been painted in the GSWR "dark crimson lake" carried by it and 836. It would have had GSWR lining, as per 836, but probably a GSR crest if it had then been ready.
At first repaint, a comparatively new mainline coach like this would have received the short-lived chocolate brown and cream, maroon later.