Late 60s early seventies I have a picture from the internet of a Class 22 at Truro were the coach is in blue and grey so I am going for that. It is noticeable that the end windows should be smaller this was eluded to by Mr Daniels when he built one back on his post page 74 . I will just have to live with that and will post a shot of the under gear shortly very much following Brain's build.
Just need to join the queue at Halfords for some primer now.