I've been sent the brass body of our new carriage 16 with the expectation that I'll make up an interior for it in styrene.
It'll have to take its place in the queue behind the current house I'm building but it shouldn't be too much trouble.
It has been made up from a Worsley Works scratch-aid kit. They can be a little tricky to put together, I understand, but if done so neatly and with care they make very nice models.
Being number 16 it includes the famous coupe compartment once graced by former Liberal Prime Minister David Lloyd George.