I would share with you my hypothesis on why London Underground and similar Metros worldwide suffer overheating. I'd be happy for your feedback. https://drive.google.com/file/d/1w18eRNzbUKd29X9ajTCg2XFTJbDbCr_-/view?usp=drivesdk.
This paper has been published worldwide in several Railway Journals and I recently appeared on the BBC New Channel's programme - Weather World. One significant Train Manufacturer had asked me to prepare a PowerPoint Presentation for them to deliver to their customers, which I have now completed. They are moving forward on this with their specialists.
I would like to generate some serious discussion on the subject so that interest can be turned into action.