http://donthorpe.org.uk/aboutauthor.htm
I guess 20 years working on the locomotive fleet at the MSC, starting as a fitter at MSC"s Mode Wheel work shops, and ending his career in the drawing office, in between serving in the R.E.M.E (Royal Electrical and Mechanical Engineers regiment) and finally as an aeronautics engineer is "Just adding what little he knew for completeness" about the MSC, its engineering and it's locomotives ?
For example, On page 66 of his book, he indicates being responsible for the inspection and condemnation of Peckett 11.
All of this however is little to do with the livery of the fleet, of which this publication has a fantastic selection from beginning thru 1984, none of which I can see show 32 or any other locomotive with single yellow lining. In looking through the book I really dont see a "corporate" scheme until the Grey scheme post war, which doesnt look widely adopted across the fleet, but certainly went beyond the J94's, the closest to corporate image seems to have started with the Diesel fleet.. even then some were Blue, some were Green.
The pre-war images show a lot of pride in the fleet's multi-coloured appearance, many of those older pictures were stage managed, but it's hard to argue that the various accident pictures, including locomotives with wagons on top of the loco are "stage managed" or that the loco was cleaned up / lined out just for the post accident photographic opportunity the incident created.
https://www.flickr.com/photos/35604059@N03/4929151536/in/photolist-8vzc2j
I haven't, as yet, seen a single yellow lined green example of an MSC Steam locomotive outside of 32 Gothenburg in preservation, if anyone has any it would be good to see & confirm, it may have been a very early 1890/1900s livery or Hudswell Clarke's delivery livery (There is a pre-delivery picture of 70 in Black with single yellow lining out there [so probably 1920/1], last time I saw that picture was at Bury at the time they painted 32 in the late 1980s), however if this was a pre-1920 livery (both 11 and 32 were pre-1921) it is possible, however it's fairly confident at this time 11 was in the style of Dodo with the dome / chimney arrangement, especially as Page 30 has an MSC corporate staged picture taken between 1902 & 1914 of several spotless MSC locomotives, including 12 in it's original form, all with double / triple linings and page 36 of 11 in the same form as 12.