For the top coat I used Railmatch paint (Stock photo)
First spraying the body overall with Rail Blue then after leaving to dry for a few days masking off and spraying Rail Grey for the off white stripe along the windows.
I first sprayed the roof in Diesel roof grey which is what is recommended, but it looked way too light, so went in to a model shop and just eyed up what looked about right which I think was GWR freight grey. In reality most coaches end up having slightly different coloured roofs.