I considered pointing out that you'd misread it, but decided that I'm not that much of an arse. :lolol:
In any case, a decent number of those pacifics (including Braunton and Tangmere) were built for the SR...
The colours are the LB&SC livery, apparently from 1870 to 1905 they used a "golden ochre" which was (rather confusingly) called "Improved Engine Green" before switching to a "dark shade of umber" from 1905 to 1923...