Has anyone else noticed the correlation between the extreme summer weather conditions and the heat on the tube? All the mechanical and electrical systems don’t know it’s summer! My car hadn’t moved all day yesterday but the temperature on the gauge was registering 32 degrees. Cars and trains are fundamentally constructed of similar material so why wouldn’t the summer weather make the trains super-hot? The trains carry all the summer heat into the tunnels and discharge some of it. Please think about it! It may surprise you that the numerous temperature readings I have taken all indicate that the trains gain much more heat in the summer when on the surface than they do underground. These tests could easily and cheaply be replicated and verified. Overheating wasn’t a problem in the winter – you probably kept your coat on in the tube then? Perhaps not surprising when the annual temperature range varies from say minus 5 to 35 degrees! Cooling stations is not addressing the real danger. That of being stuck in an overheated train in a tunnel when one is unable to escape. From the point of view of comfort, most passengers spend more time in a train than on a platform. So, what has been achieved does not, I believe, address the real issues. http://stories.scienceinpublic.com.au/2016/warshippaint/ This would be part of my suggested solution.