A few extras added:

The rear screw link coupling, one of the brass ones by Romford. It needs some painting to fit in:

And a thin veneer of coal has been added. What a difference:

Next we have to tackle the double chimney. This is what it looks like now:

Black paint might be enough but I am tempted to drill out and ream the rear chimney before painting.

Another project, now waiting on the mail, is to replace the Hornby name plates. So this is a "before" shot:

The close up photos really do justice to the model's detailing. My few add ons are really just icing on the already iced cake!