Just a correction on terminology: the coaches are 'clerestory' coaches, not 'celestials'.
These coaches have existed since Tri-ang days and have made a few appearances over the years - I recall they appeared as LNER 'teaks' in the late 1980's and of coarse, they appear in the Thomas range as 'Old Slowcoach'.
As far as I am aware, they don't represent anything prototypical, but they do represent early GWR panelled stock, so would have the panelling fully lined out. The livery presented in your picture is more appropriate for the 1920's and 30's, by which time, these coaches would have long since been decommissioned!
My father worked on a rake of these back in the early 1970's when there were no other options, fully upgrading them with new GWR bogies (they come with BR Mark 1 bogies) and fully lining them out.
I myself have used the Tri-ang product as a basis for building freelance 009 coaches.
These coaches have existed since Tri-ang days and have made a few appearances over the years - I recall they appeared as LNER 'teaks' in the late 1980's and of coarse, they appear in the Thomas range as 'Old Slowcoach'.
As far as I am aware, they don't represent anything prototypical, but they do represent early GWR panelled stock, so would have the panelling fully lined out. The livery presented in your picture is more appropriate for the 1920's and 30's, by which time, these coaches would have long since been decommissioned!
My father worked on a rake of these back in the early 1970's when there were no other options, fully upgrading them with new GWR bogies (they come with BR Mark 1 bogies) and fully lining them out.
I myself have used the Tri-ang product as a basis for building freelance 009 coaches.