Suddenly the model looks a lot better for being given a new lick of paint:

Aside from the paintwork, I've built new front frames to sit just above the bogie and behin the cylinders (this looks much better than the daylight there previously), added a snifting valve to the side of the chimney and reinstated the steampipe running down the driver's side of the boiler. Following a 1925 photograph of Lord Faringdon, I filed down the tops of the tender axleboxes and then replaced them with an attempt at 'Iracier' axlebox covers in plastic sheet.