I wonder if poor condition stock is just accepted for steam specials.
The only privately run steam charter I have been on was a present from a friend that accompanied me. I travel by train a lot, and I took it for granted that, in early March, the train would be heated and dressed accordingly. The train started from their depot, but we joined it at a large station after a few miles. When we boarded, our coach was unheated. The other passengers clearly expected this - they had several layers of clothing and very thick socks. I asked our coach steward about it, and he said that they might be able to do something about it at the destination, but I regarded this as a fob-off because they could have done it at their depot before leaving unless it was a 'too-difficult' fault. it was only when walking down to the 'buffet' (table with tea urn in the van of a BSK) that I realised that all the other coaches were warm. I approached our steward again and suggested out of fairness that, for the return, we should be exchanged with the passengers in another coach. He reacted to my suggestion with contempt.
Apart from freezing the itinerary was changed after boarding so we went down Shap behind a Jubilee instead of up it. Certainly a memorable birthday present, don't think I'll lash out £100 to endure a repeat...