In the bad old days, we used to get problems with the termpature in trains all the time. They had windows which opened, which we did when it got too hot. In summer, travelling down the line there could be many windows open, blowing air in the carriage.
Thankfully, these days have gone now. The windows have all been blocked up and sealed, because now we have air conditioning. It’s great. Even when the weather outside picks up to a scorching 24C, inside the train will remain a comfortable 32.
Originally published on my old blog site.