Another question - is there a "dress code" for the onboard lounge for the evening/night when people are in there to have a few drinks and avoid staying in their tiny rooms. We'll be backpacking and don't particularly want to have to bring smart clothes, but don't want to lower the tone either. I imagine breakfast will be pretty casual, but the night session and dinner might be more formal?
I think you’re confusing the Caledonian Sleeper with the Orient Express.