That looks PURE 1961!
This actually shows up very well how a grey-painted model ends up with realistic coal dust, oil and soot weathering. Many people thought that most engines were black - I did myself as a mere spotty teen - in late CIE days; in fact only a few were, if they'd seen a paintbrush literally within the last five years or so of steam. Not many did - but they all ended up looking exactly like this, as numerous photos show in numerous books, and an ever-decreasing handful of us remember. After all, it's 58 years since steam ended on CIE, and some SEVENTY years before the AEC railcars largely displaced it from main line passenger trains....
The green Woolwich is exactly as many of the green engines ended up - so disgracefully grubby that it was actually not easy to tell whether they were green, grey or black under it.
Excellent job, Dempsey; beautifully filthy, decrepit and untidy looking locos - thus, highly recommended!